A Bibliometric and Visualization Analysis of Mindfulness and Meditation Research from 1900 to 2021

This study comprehensively summarizes research in the field of meditation, especially mindfulness meditation from 1900 to 2021, by analyzing the knowledge map through CiteSpace and VOSviewer software. Using “mindfulness *” or “meditation *” as the topic, articles included in the Science Citation Index Expanded and Social Sciences Citation Index were searched in the web of science core database, resulting in the selection of 19,752 articles. Over half a century ago, Deikman published the field’s first article in the Journal of Nervous and Mental Disease in 1963, and publications have soared in subsequent decades. The USA is in the core position in terms of global collaboration, total publication numbers, and total citations. The Mindfulness journal ranked first for the most published articles and citations. “The benefits of being present: Mindfulness and its role in psychological well-being,” written by Brown and Ryan, was the most cited article. Mindfulness, meditation, depression, intervention, stress reduction, stress, and anxiety are the top co-occurrence keywords. The timeline of cluster analysis discloses that before 2010, hypertension, cancer, mindfulness, generalized anxiety disorder, and other topics received great attention. In the decade since 2010, scholars have shown interest in meta-analysis, attention, and self-assessment, and keen attention to mindfulness-based interventions. These findings provide an important foundation to direct future research.


Introduction
Meditation is comprised of a family of self-regulation practices that train attention and awareness to bring mental processes under greater voluntary control to thereby foster general mental well-being and development, and/or specific capacities such as calmness, clarity, and concentration [1]. Among the various categories of meditation, mindfulness, as "the awareness that emerges through paying attention on purpose, in the present moment, and nonjudgmentally to the unfolding of experience moment by moment," has generated increasing scholarly attention [2]. The number of mindfulness and meditation studies has expanded in recent years. Multiple reviews and meta-analyses have analyzed and summarized the effects of meditation on behavior and brain imaging in clinical and non-clinical subjects, and have demonstrated significant physical and mental health benefits [3][4][5][6]. In addition, mindfulness is a popular practice. According to a survey conducted by the U.S. National Institutes of Health, 8% of American adults practiced meditation in 2012 [7].
In recent decades, the research on mindfulness and meditation has developed rapidly, and a variety of topics have emerged [3,6]. For example, research hotspots range from VOSviewer is a software tool developed for constructing and viewing bibliometric maps. It constructs a map based on a co-occurrence matrix [31].
In the visualizations, one node represents a project (such as an author or a country), the size of the node reflects its importance (e.g., number of papers published by the project), and the color of the node signifies the group according to the default clustering method. Network connections denote collaborations between projects. The line width represents the intensity of collaboration. In this study, we used VOSviewer to make country collaboration, inter-institution collaboration, co-authorship, and co-citation networks.
Before analyzing the results, all the inconsistencies in the bibliographic data were standardized and corrected. These inconsistencies appeared due to errors in the process of capturing the WOS data, abbreviations, and mistakes made by the authors in the references. For example, to prevent classification errors, we uniformly revised the expressions cognitive behavior therapy, cognitive behaviour therapy, cognitive behavioural therapy, cognitivebehavior therapy, and cognitive behavioral therapy to cognitive-behavioral therapy. The inconsistencies were checked by the first author. See Appendix A Table A1 for details.

Annual Comparative Analysis of Mindfulness and Meditation Publications
Meditation emphasizes mental development, such as bhavana (mental cultivation) in Buddhism and lien-hsin (refining the mind) in Taoism. In Western definitions, meditation is a self-regulation strategy with a particular focus on training attention [1]. The first meditation article was published by Deikman in the Journal of Nervous and Mental Disease in 1963 [32]. Eight subjects participated in the experiment, where four performed meditation for twelve sessions and the other four performed brief meditation control procedures. The participants learn about contemplative meditation, and concentrate on a blue vase without analyzing the different parts of the vase by thinking a series of thoughts about the vase. Results showed phenomena common to all subjects, such as perception of the vase (e.g., more vivid), time-shortening (e.g., feel less time elapsed), conflicting perceptions (e.g., the vase filled my visual field/It did not fill the field by any means), development of stimulus barriers (e.g., increase in ability to keep out distracting stimuli), personal attachment to the vase, and pleasurable quality (e.g., pleasurable, valuable, and rewarding). For the first time, this article described the meditation training methods and the subjects' experience in great detail.
In addition to Deikman's research, Kabat-Zinn played an important role in the promotion of meditation. Among the top 10 most frequently cited articles, Kabat-Zinn contributed 3 articles (cited 1804, 939, and 374 times). See Appendices B and C (Tables A2 and A3) for details. Kabat-Zinn's pioneering contribution is that he has established a systematic eight-week mindfulness-based stress reduction (MBSR).
During the century from 1900 to 1999, only 625 meditation articles were published (5 in the 1960s, 174 in the 1970s, 115 in the 1980s, and 331 in the 1990s). Figure 1 depicts the numbers of publications and citations of mindfulness and meditation articles since 2000. The number of global mindfulness and meditation articles included in SCI-E/SSCI increased annually, from 131 per year in 2000 (0.70% of the total publications) to 2978 per year in 2020 (15.83% of the total publications). The number of articles published annually increased by over 30% during five particular years (46.46% in 2004, 33.91% in 2006, 37% in 2009, 35.31% in 2012, and 34% in 2019). The number of citations included in SCI-E/SSCI from 2000 to 2020 also increased annually, from only 517 (0.13% of total citations) in 2000 to 70,086 (17.17% of total citations) in 2020. Annual increases of at least 30% were observed in more than half of the included years. Int. J. Environ. Res. Public Health 2021, 18, x FOR PEER REVIEW 4 of 26 to 70,086 (17.17% of total citations) in 2020. Annual increases of at least 30% were observed in more than half of the included years.   Figure 2a exhibits the changing trends of international and non-international collaborative publications, as well as percentages of international collaborative articles. Collaborations of institutions and authors are presented in Figure 2b,c, respectively. Increasing rates of collaborative research among countries (81.48%), institutions (91.38%), and authors (90.34%) reflect the prevailing trend. The proportion of collaborative articles accelerated most rapidly during [2007][2008], and continues to rise. Table 1 shows the 15 most cited mindfulness and meditation articles. "The benefits of being present: Mindfulness and its role in psychological well-being," published in the Journal of Personality and Social Psychology (JPSP) by Brown and Ryan (2003) [33], was cited most frequently (4585 citations), followed by "Assessment and Clinical Psychology-Science and Practice" by   [34] and "Mindfulness: A Proposed Operational Definition" by   [35], ranking second and third with 2849 and 2597 citations, respectively. The two most frequently cited articles described the development and psychometric properties of the Mindful Attention Awareness Scale (MAAS) and the Five-Facet Mindfulness Questionnaire (FFMQ), respectively. The third most cited article proposed a two-component model and an operational definition of mindfulness.

Most Cited Articles
The benefits of being present: Mindfulness and its role in psychological well-being 2 Baer et al., (2006) [34] 2849 Assessment Using self-report assessment methods to explore facets of mindfulness 3 Bishop et al., (2004) [35] 2597 Clinical Psychology-Science and Practice Mindfulness: A proposed operational definition 4 Kabat-zinn (2003) [2] 2553 Clinical Psychology-Science and Practice Mindfulness-based interventions in context: Past, present, and future 5 Hayes et al., (2006) [36] 2349 Behaviour Research and Therapy Acceptance and commitment therapy: Model, processes and outcomes 6 Baer (2003) [37] 2004 Clinical Psychology-Science and Practice Mindfulness training as a clinical intervention: A conceptual and empirical review 7 Grossman et al., (2004) [38] 1983 Journal of Psychosomatic Research Mindfulness-based stress reduction and health benefits: A meta-analysis 8 Hofmann et al., (2010) [39] 1682 Journal of Consulting and Clinical Psychology The effect of mindfulness-based therapy on anxiety and depression: A meta-analytic review 9 Kabat-zinn (1982) [8] 1666 General Hospital Psychiatry An outpatient program in behavioral medicine for chronic pain patients based on the practice of mindfulness meditation: Theoretical consideration 10 Teasdale et al., (2000) [12] 1600 Journal of Consulting and Clinical Psychology Prevention of relapse/recurrence in major depression by mindfulness-based cognitive therapy 11 Deci & Ryan (2008) [40] 1572 Canadian Psychology-Psychologie Canadienne Self-Determination Theory: A macrotheory of human motivation, development, and health 12 Brown, Ryan, & Creswell (2007) [41] 1370 Psychological Inquiry Mindfulness: Theoretical foundations and evidence for its salutary effects 13 Shapiro et al., (2006) [42] 1281 Journal of Clinical Psychology Mechanisms of mindfulness 14 Davidson et al., (2003) [43] 1240 Psychosomatic Medicine Alterations in brain and immune function produced by mindfulness meditation 15 Diamond & Lee (2011) [44] 1187 Science Interventions shown to aid executive function development in children 4 to 12 years old Among the top fifteen most cited publications, three authors contributed two articles each. For example, Brown published two highly cited articles in JPSP (4585 citations) as well as in Psychological Inquiry (1370 citations). Baer published highly cited articles in Assessment (2849 citations) and in Clinical Psychology-Science and Practice (CPSP, 2004 citations), while Kabat-Zinn wrote impactful papers in CPSP (2553 citations) and General Hospital Psychiatry (1666 citations).
The most cited source journal is JPSP, which publishes original papers in all areas of personality and social psychology, including attitude and social cognition, interpersonal relations and group processes, as well as personality processes and individual differences. Three highly cited articles were from CPSP (597, 2553, and 2004 citations), the official publication of the American Psychological Association Division 12, the Society of Clinical Psychology. The journal publishes papers regarding developments in the science and

Most Productive Institutions
Nine of the ten most prolific institutions in the mindfulness and meditation field were located in the USA. The top three institutions were Harvard University, the University of Toronto, and the University of Washington. The top three institutions for total citations were Harvard University (20,074), the University of Massachusetts (17,572), and the University of Toronto (14,657), while articles from the University of Massachusetts (86.56), the University of Toronto (56.81), and the University of Wisconsin (51.24) generated the highest CP (Table 3). Table 4 shows the total number of articles published in the top 20 journals that address mindfulness and meditation, as well as the number of citations generated by the particular journal's articles, and the consequent CP. Although the Mindfulness Journal began recently, in 2010, as a journal dedicated to the mindfulness field, it has published the largest number of articles (1288), followed by Frontiers in Psychology (442) and Annals of Behavioral Medicine (269). Mindfulness ranked first in total citations (15,208), followed by Behavior Research and Therapy (9601 citations) and Personal and Individual Differences (6084 citations). Behavior Research and Therapy ranked first in CP (76.81), followed by the Journal of Clinical Psychology (54.39) and Consciousness and Cognition (38.33). Three articles were cited more than 1000 times, and these were   [36] from Behavior Research and Therapy (2327 citations),   [42], Journal of Clinical Psychology (1273 citations), and   [43] from Psychological Medicine (1237 citations).

Analysis of Collaborations
The results of our analysis of collaborations among countries (regions), institutions, and authors are presented in Figures 3 and 4. In the visualizations, one node represents a project (such as an author), the size of the node reflects the number of papers published by the project, and the color of the node signifies the group according to the default clustering method. Network connections denote collaborations between projects. The line width represents the intensity of collaboration.
The results of our analysis of collaborations among countries (regions), institutions, and authors are presented in Figures 3 and 4. In the visualizations, one node represents a project (such as an author), the size of the node reflects the number of papers published by the project, and the color of the node signifies the group according to the default clustering method. Network connections denote collaborations between projects. The line width represents the intensity of collaboration.

Analysis of Collaborative Networks among Countries/Territories
Link strength, literature quantity, and citations are the indicators of collaborative degree. Figure 5 displays the collaborative network between countries (regions) in the mindfulness and meditation field (the threshold of link strength is set to 10). From the perspective of link strength, the USA (24,309,335 articles, 26,2811 citations) has been the center of global collaboration in this field, and its international collaborative activity is much higher than that of other countries. The USA was followed by England (12,791,805 articles, 49,712 citations), Germany (8,031,114 articles, 28,146 citations), Australia (7,991,408 articles,

Analysis of Collaborative Networks among Countries/Territories
Link strength, literature quantity, and citations are the indicators of collaborative degree. Figure 5 displays the collaborative network between countries (regions) in the mindfulness and meditation field (the threshold of link strength is set to 10). From the perspective of link strength, the USA (24,309,335 articles, 26,2811 citations) has been the center of global collaboration in this field, and its international collaborative activity is much higher than that of other countries. The USA was followed by England (12,791,805 articles, 49,712 citations), Germany (8,031,114 articles, 28,146 citations), Australia (7,991,408 articles, 24,118 citations), Canada (7,251,368 articles, 43,154

Analysis of Collaborative Networks among Institutions
The number of literature access was set to 30, and 264 of the 10,495 institutions meeting the standards were displayed. Figure 4 shows the inter-institution collaborative network (the threshold of link strength shown in the setting is 5

Keyword Co-Occurrence Network Analysis
Keywords represent the highly concentrated content of literature research. The cooccurrence frequency of keywords can reflect dynamic trends of mindfulness and meditation research. Keywords with high frequencies reflect the focus of the research field. They identify advanced research methods, hot issues to be solved urgently, or academic topics of interest in particular timeframes. Figure 5 shows the keyword co-occurrence analysis network diagram. All keywords were included in the analysis. Among all 30,430 keywords, the top 150 were displayed for mapping. The top 20 co-occurring keywords are shown in Table 5. Mindfulness and meditation were the most frequent, followed by depression, intervention, stress reduction,

Analysis of Collaborative Networks among Institutions
The number of literature access was set to 30, and 264 of the 10,495 institutions meeting the standards were displayed. Figure 4 shows the inter-institution collaborative network (the threshold of link strength shown in the setting is 5

Keyword Co-Occurrence Network Analysis
Keywords represent the highly concentrated content of literature research. The cooccurrence frequency of keywords can reflect dynamic trends of mindfulness and meditation research. Keywords with high frequencies reflect the focus of the research field. They identify advanced research methods, hot issues to be solved urgently, or academic topics of interest in particular timeframes. Figure 5 shows the keyword co-occurrence analysis network diagram. All keywords were included in the analysis. Among all 30,430 keywords, the top 150 were displayed for mapping. The top 20 co-occurring keywords are shown in Table 5. Mindfulness and meditation were the most frequent, followed by depression, intervention, stress reduction, stress, and anxiety. The highly frequent use of keywords such as quality of life, health, emotion regulation, therapy, cognitive therapy, mental health, symptoms, and cognitive behavioral therapy reflect wide therapeutic applications of methods based on mindfulness, such as mindfulness-based cognitive therapy (MBCT) and mindfulness-based stress reduction (MBSR), that are used to prevent recurrent depression and to reduce stress. In addition, validation appeared frequently in keywords, such as the validity test of measurements of mindfulness. Keywords also reflected a large number of randomized controlled trial studies and meta-analyses to report empirical demonstrations of the clinical utility of mindfulness and meditation. In addition, attention and acceptance are also research foci. On one hand, mindfulness and meditation can improve the quality of attention and acceptance; on the other hand, attention and acceptance are the two core elements of mindfulness [60,61].

Co-Citation Analysis
If two items (such as articles) are cited together in the references of a cited item, they are co-cited. The number of co-citations can be used to measure the similarity and correlation between articles. Journal co-citations, article co-citations, and keyword co-citations can be analyzed according to different project contents.

Journal Co-Citation Analysis
Through the analysis of co-cited documents, we can obtain a knowledge base of a particular field. The research frontier is composed of a collection of cited literature that comprises these knowledge bases.
The VOSviewer identified 96,779 journals. Table 6 displays the results of our journal co-citation analysis. Figure 6 shows the co-citation connectivity between journals. The Journal of Personality and Social Psychology was the most frequently cited journal, and is in the core position of the network. The Journal of Consulting and Clinical Psychology ranked second.

Reference Co-Citation Analysis
A co-citation relationship is defined by the simultaneous citations of two papers in a third paper [62]. Reference co-citation analysis is an important means to detect the structure and evolutionary path of a specific domain. Figure 7 shows the top 1000 of 412,783

Reference Co-Citation Analysis
A co-citation relationship is defined by the simultaneous citations of two papers in a third paper [62]. Reference co-citation analysis is an important means to detect the structure and evolutionary path of a specific domain. Figure 7 shows the top 1000 of 412,783 tabulated references. Among the top 20 most frequently cited articles, Kabat-Zinn and Baer contributed 4 articles each, while Brown authored 2 articles. Seven publications were review articles or meta-analyses [2,13,[37][38][39]41]. Another six articles were classic papers written by leaders in the field introducing therapeutic interventions such as the MBSR [8][9][10], MBCT [11,12], and acceptance and commitment therapy (ACT) [63]. The other five articles reported the development of mindfulness questionnaires, such as the MAAS [36], FFMQ [34,64], and the Kentucky Inventory of Mindfulness Skills [65]. Stress and stress reduction are important co-occurrence keywords (Table 7), so the development of the Perceived Stress Scale (PSS) is also an important co-citation article [66]. There are also two articles on the mechanism of mindfulness [42,67].  [2,13,[37][38][39]41]. Another six articles were classic papers written by leaders in the field introducing therapeutic interventions such as the MBSR [8][9][10], MBCT [11,12], and acceptance and commitment therapy (ACT) [63]. The other five articles reported the development of mindfulness questionnaires, such as the MAAS [36] , FFMQ [34,64], and the Kentucky Inventory of Mindfulness Skills [65]. Stress and stress reduction are important co-occurrence keywords (Table 7), so the development of the Perceived Stress Scale (PSS) is also an important co-citation article [66] . There are also two articles on the mechanism of mindfulness [42,67].   Next, the literature was divided into clusters. The log-likelihood test algorithm was used to extract nominal terms from the keywords of the cited literature and to name the clusters ( Figure 8). To better reflect the time characteristics impacted by clustering, Figure 9 places the documents of the same cluster on the same horizontal timeline. The number of documents in each cluster can be clearly represented in the timeline view. The more articles in a cluster, the more important the clustering field. The timespan of documents in each category can also be obtained to further reflect the time characteristics influenced by clustering.

Burst Detection Analysis
Publications receiving a surging citation frequency reflect emerging trends in scientific research fields. Citation bursts suggest increased scholarly attention to the corresponding publications. Table 8 lists the top 30 references with the strongest citation bursts cited by INS publications. Green color indicates the years since the article was published. Red color indicates the years with citation bursts.

Burst Detection Analysis
Publications receiving a surging citation frequency reflect emerging trends in scientific research fields. Citation bursts suggest increased scholarly attention to the corresponding publications. Table 8 lists the top 30 references with the strongest citation bursts cited by INS publications. Green color indicates the years since the article was published. Red color indicates the years with citation bursts.

Burst Detection Analysis
Publications receiving a surging citation frequency reflect emerging trends in scientific research fields. Citation bursts suggest increased scholarly attention to the corresponding publications. Table 8 lists the top 30 references with the strongest citation bursts cited by INS publications. Green color indicates the years since the article was published. Red color indicates the years with citation bursts.  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [34] 191.14 2009 2014 CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [37] 156 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [11] 152 .  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [38] 151  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [39] 148 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [35] 124  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [68] 116.86 2017 2021  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [41] 113 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [43] 113 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [28] 104 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [67] 102 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [65] 95  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [42] 95  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [69] 93.673 2017 2021  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [12] 89  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [13] 88.544 2010 2016  Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [2] 88  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [70] 84 .  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [71] 81.431 2014 2019  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [72] 81  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [73] 80.751 2017 2021  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword   [74] 80.172 2010 2015  CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword Green color indicates the years since the article was published. Red color indicates the years with citation bursts. CiteSpace provides burst detection that can detect large changes in the number of citations in a particular timeframe, and is used to identify the declining or increasing use of a topic word or keyword. Table 8 presents the results of the emergent analysis of the top 30 publications. The red segments show the starting and ending times of particular literature bursts. The strongest burst citation was exhibited by an article by Brown et al. [33] that reported the development of the MAAS questionnaire to explore the benefits of mindfulness in improving psychological well-being. The next strongest bursts were associated with two articles by Baer that introduced the FFMQ questionnaire and discussed the five elements of mindfulness (2006) [34], and that reviewed the clinical utility of mindfulness training (2003). The earliest article in our burst detection analysis was a review by Teasdale et al. [12], one of the developers of MBCT, who utilizes mindfulness cognitive therapy to prevent recurrent depression.

Discussion
Our study provided a comprehensive perspective of the evolution and development of mindfulness and meditation literature. By using bibliometric methods and customized text mining techniques, we analyzed distribution (including distributions of countries/territories, institutions, and journals), collaboration (including international, interinstitutional, and inter-author collaborations), and document co-citations (including keyword co-occurrence networks, journal co-citations, reference co-citations, and reference citation bursts).
First, the number of publications and citations may reflect the overall development of the mindfulness and meditation field. No papers on mindfulness and meditation were published until over half a century ago, when Deikman [32] published the field's seminal article in the Journal of Nervous and Mental Disease. Consequently, mindfulness and meditation research have a long history. However, the numbers of mindfulness and meditation-related publications fluctuated at low levels during the 20th century. Since 2004, the number of publications has increased by more than 30% every few years. The citation rate has increased by more than 30% in over half of the years since 2002. At the same time, the prevailing trend in mindfulness and meditation literature has been towards increased collaboration among countries, institutions, and authors.
Second, from the perspective of distribution, the USA has been the center of global collaboration, and its strength of cooperation has been much higher than that of other countries. The USA also has led other countries in total numbers of publications and citations. However, Canada ranked first in the CP. From the perspective of research institutions, Harvard University ranked first in total numbers of publications and citations, while the University of Massachusetts ranked first in the CP. Nine of the top ten institutions in the global field of mindfulness and meditation are located in the United States. Harvard Medical School has been at the center of inter-institution collaboration. Taken together, our data indicate that the USA is in the core position in the field of mindfulness and meditation.
Third, in terms of the influence of journals and authors, Mindfulness ranked first for the most published articles and citations. However, Behavior Research and Therapy ranked first in the CP. From the perspective of journal co-citation analysis, JPSP has the most co-citations and the largest link strength, followed by Mindfulness. Brown and Ryan are the most cited authors, due to multiple citations of their article: "The benefits of being present: Mindfulness and its role in psychological well-being" [33].
Fourth, keyword analysis disclosed that in general, physical and mental health disorders such as depression, anxiety, stress, emotion regulation, and quality of life have been the primary research foci in the field of mindfulness and meditation, which reflects its wide therapeutic applications. At the same time, a large number of randomized controlled trials and meta-analyses have been completed. Researchers have also paid attention to validity of measurement tools and the mechanism of mindfulness and meditation.
Fifth, JPSP, Mindfulness, and JCCP are the leading journals in the field of mindfulness and meditation. The common concerns of scholars include reviews and meta-analyses of the clinical utility of mindfulness and meditation, and these include the classic articles by the developers of MBSR, MBCT, and ACT, and mindfulness-related questionnaires. The timeline of cluster analysis discloses that before 2010, hypertension, cancer, mindfulness, generalized anxiety disorder, and other topics received great attention. In the decade since 2010, scholars have shown interest in meta-analysis, attention, and self-assessment, and keen attention to mindfulness-based interventions. The development of MAAS and FFMQ questionnaires and the studies of the clinical efficacy of mindfulness and meditation showed the strongest bursts. A review of the effect of MBCT on preventing recurrent depression showed the earliest citation burst.
Recently, another article using the bibliometric method to analyze mindfulness hotspots was published [81]. In contrast, the inclusion criteria of the two articles are different, and the final results are somewhat different. For example, Baminiwatta and Solangaarachchi (2021) [81] searched for articles from 1966 to 2021 in the WOS core collection, with mindfulness as the topic. Finally, 16,581 articles were included. In this study, SCI-E and SSCI articles from 1900 to 2021 (4 March 2021) were searched, with "mindfulness *" or "meditation *" as the topic in the WOS core collection, and 19,752 articles were included. Therefore, Baminiwatta and Solangaarachchi (2021) [81] found that the first mindfulness article was "Mindfulness of Perception" published in 1966, and we found that the first article in the meditation field was "Experimental meditation" in 1963. Meditation and mindfulness are closely related, so the two articles can complement each other from different views.

Implications and Future Directions
Citation bursts reflect the emerging trends in scientific research fields and suggest the future directions.   [68] showed the strongest citation bursts among the recent emerging ones. The authors described the neuroscience of mindfulness meditation and recommended that further research with longitudinal, randomized, and actively controlled research designs and larger sample sizes are needed to advance the understanding of the mechanisms of mindfulness and meditation [68,73].
It is essential to pay attention to misinformation and poor methodology in previous mindfulness studies, with a particular focus on assessment, mindfulness training, possible alternative effects, and intersection with brain imaging in the future [28]. Scholars believe that future research in meditation would benefit from addressing the remaining methodological and conceptual issues [70,73,75].
Furthermore, effectiveness studies that carefully consider how to reach out to communities of need with evidence-based, cost-effective, and sustainable mindfulness interventions are needed in the coming years [79]. The timeline of analysis of clusters also confirmed that mindfulness-based interventions are still an ongoing trend.

Limitations
Although meditation can be roughly divided into focused attention meditation and open monitoring meditation, it is difficult to separate specific meditation techniques (e.g., Chan, Taichi, Baduanjin qigong), so the subcategories of meditation were not compared in this study.
The names of the clusters were obtained by extracting terms from the keywords of the references through the log likelihood test algorithm. Since over 19,752 articles were identified, it was impossible for the authors to refine and analyze the content of each article. Since the articles were not randomly checked as to whether they are related to the topic, this may be problematic because some terms, such as meditation, have multiple meanings in English, some of which are irrelevant. Another major limitation is that the search was limited to databases (SCI-E, SSCI) that mainly include English publications, excluding most journals published in other languages. This will bias the results. For example, if Chinese or Korean databases were included, the results may be very different from those of a large number of papers in East Asia.
As an interdisciplinary science of quantitative analysis, bibliometrics can predict the status and development trend of mindfulness and meditation. Despite these advantages, it cannot recommend which method is better through indicators such as effect size, as in meta-analysis. Furthermore, bibliometric analysis is mainly based on the abstract, title, keywords, and references, without checking the full text of the paper, which also affects the final results.
In conclusion, this study provided a comprehensive review and intuitive analysis of publications related to mindfulness and meditation from 1900 to 2021. Using two effective bibliometric tools, VOSviewer and CiteSpace, this paper analyzed status and development trends of this field from many perspectives, and may inform future research in the field of mindfulness and meditation.

Institutional Review Board Statement:
This article does not contain any studies performed by the authors with human participants or animals.

Informed Consent Statement: Not applicable.
Data Availability Statement: The datasets generated and/or analyzed during the current study are available from the corresponding author upon reasonable request.

Conflicts of Interest:
The authors declare no conflict of interest.

NO. Items
Replace by