Sustainability of Positive Psychological Status in the Workplace: The Inﬂuence of Organizational Psychological Ownership and Psychological Capital on Police Ofﬁcers’ Behavior

: Drawing on the theory of conservation of resources (COR), the purpose of this study is to examine the mechanisms through which employee organizational citizenship behavior and job performance are affected by positive psychological status at work. Structural equation modeling was applied to analyze the data collected from 543 police ofﬁcers in Northern Taiwan. The empirical results reveal that organizational psychological ownership positively associated with psychological capital, and psychological capital positively associated with both job performance and organizational citizenship behavior. Additionally, this study demonstrates that the relationship between organizational psychological ownership and job performance and organizational citizenship behavior are both fully mediated by psychological capital. Organizational psychological ownership and psychological capital are both positive psychological strengths to assist employees facing stressful work circum-stances. The importance of examining the relationship between the components of organizational psychological ownership, psychological capital, job performance, and organizational citizenship behavior is pointed out due to the importance of organizations promoting the development of psychological resources to promote sustainable positive behavior and results in the workplace.


Introduction
Both in public and private organizational contexts, organizations are facing critical economic and managerial difficulties to survive in the market [1]. In order to maintain the competitive advantage and organizational growth, organizations have to utilize their strategic resources effectively, including the human resources [2]. The key to the sustainability of an organization is linked to the consideration of the unique and distinctive resources for organizations. Human resources, therefore, are the first and most important capital of the organization, and they are considered the key resource of an organization, cannot be easily imitated by competitors, and enable the generation of unique competitive advantage for organizational sustainability [3]. According to this argument, employees are assets of a skillful and committed workforce and are driven to create and maintain to achieve organizational goals. Employees have to be included in the organization structure through training and socialization [4]. Human resources can be seen as organizational resources that can leverage management strategies for sustainability [3]. Through human resource management, employees could reinforce the interpersonal/organizational relationship, motivate the workforce, and enhance performance and positive behavior [1]. However, in the organic working circumstance, employees inevitably experience job-related irrational demands and increase job dissatisfaction [5]. These negative experiences of employees may trigger them to disconnect or detach from their organizations and organizational members [6]. nization, such as the military, police, and fire departments. Thus, employees with the experience of positive perceptions about their organization would lead to positive work behaviors [17,29,30]. However, scholars have paid scant attention on the organizational psychological ownership of the policing workforce and its positive effects, such as job performance and organizational citizenship behavior. Therefore, in this research, we aim at investigating the mechanisms through which organizational psychological ownership can increase an employee's job performance and organizational citizenship behavior.
In addition, psychological capital has received remarkable attention in the field of organizational behavior over decades. Positive psychology has had a notable influence on the strengths of the employee's health, well-being, and performance [31,32]. This is integrated in the psychology of sustainability and sustainable development both in the fields of the ecological and socioeconomic environment [33][34][35]. Psychological capital is a positive psychological state and a kind of positive psychological energy manifested by individuals [36,37], including self-efficacy, optimism, hope, and resiliency [38]. Previous studies have also demonstrated the relationship between employees' psychological capital and employees' job satisfaction, commitment, and performance [39][40][41]. Luthans et al. [42] indicated that organizations could enhance the long-term competitive advantage through strengthening the psychological capital ability of the members. Walumbwa et al. [43] also demonstrated that psychological capital will directly affect work attitudes and behaviors. Psychological capital is the antecedent of employees' work attitudes. Regardless of the type of organization, therefore, the responsibilities and behaviors of organization members are to create better performance. Based on the abovementioned, with positive psychological capital, employees would have positive attitudes and be more willing to achieve the organization's goals, increase the work performance [44], and enhance discretionary work behaviors [45,46]. Thus, employees' psychological capital is a critical factor to have a positive association with job performance and organizational citizenship behavior in the workplace [17,47].
For individuals, organizational psychological ownership and psychological capital are both positive psychological constructs and would result in positive organizational behaviors in workplaces [48]. Therefore, with a meaningful and emotional connection to the organization, employees strongly believe that the work or the organization is "meaningful" [49][50][51]. Pierce et al. demonstrated that organizational psychological ownership can present a stronger motivation, a more positive attitude, and a higher perception of responsibility. They also indicated that organizational psychological ownership would increase confidence and positive attitudes of individuals, which may be related to the four elements of psychological capital [18]. Moreover, Pierce et al. [52] argued that ownership is a kind of presentation of the psychological state and is considered as the condition of "mine", which forms the relationship between an employee's attitude and behavior.
Previous studies suggest organizational psychological ownership could enhance job performance and organizational citizenship behavior, but do not explore clearly why organizational psychological ownership would enhance an individual's willingness to perform positive behavior. Additionally, employees with higher psychological capital would have greater confidence [53], and may stimulate organizational citizenship behavior [54]. Subsequent studies exploit psychological capital as the variable to predict organizational behaviors [55][56][57]. However, rare studies have identified psychological capital as a mediator between organizational psychological ownership and job performance and organizational citizenship behavior. We aim at increasing the explanation of the relationships of past findings by examining and testing the sample of police officers. Further, to anchor the theoretical arguments and to advance the literature, this study employs the theory of resource conservation and provides a much clearer picture of how organizational psychological ownership and psychological capital helps employees achieve higher job performance and organizational citizenship behavior. Lastly, drawing on previous literatures, we suggest psychological capital as a mediator explaining the relationships between organizational psychological ownership and job performance and organizational citizenship behavior. In sum, by exploring the paths, this study is aligned with the organizational psychology of sustainability and positive behavior, and advances our knowledge about the effects of the quality of the police at work.

The Positive Influence of Organizational Psychological Ownership on Psychological Capital
Psychological ownership is a state in which an individual considers a particular object (intangible or tangible) as psychologically associated with, owned, and an extension of the owner [52]. Pierce et al. introduced psychological ownership as a cognitive-affective construct that is based on individuals' feelings for an object. They argued that psychological ownership is a kind of personal perception of ownership, which expresses that the object is "mine" and is an extension of oneself [18]. Psychological ownership consists of three elements, born with a sense of possession, the subject matter of possession, and the sense of ownership with a significant impact on individual attitudes and behaviors. It could meet three needs of human beings, including belonging, self-efficacy, and self-identity [23].
The roots of organizational psychological ownership are derived from three motives, namely having a place, efficiency and effect, and self-identification [52]. According to Pierce et al. [18], when employees have a higher perception of organizational psychological ownership, they will have more emotional connection with the organization, will consider the organization to be an extension of themselves, and will consider the success of the organization equaling to their success. Therefore, organizational psychological ownership can be viewed as a valid predictor of employee's work attitudes and behaviors [21].
Psychological capital is a positive psychological state, including self-efficacy, optimism, hope, and resilience [41,58]. Psychological capital refers to an individual's positive psychological state of development and is characterized by self-efficacy, optimism, hope, and resilience [38]. Goldsmith et al. [59] argued psychological capital could enhance individual productivity. According to Luthans et al., these four elements of psychological capital can effectively improve the individual's performance [48,60]. Theoretical and empirical studies have identified that features of these four elements of psychological capital have a comprehensive effect on each other, and the combining effect of predictive variable will be more significant [61,62].
Pierce et al. [18] indicated that organizational psychological ownership can present a stronger motivation, a more positive attitude, and a higher perception of responsibility. According to Coutu, when police officers have an emotional connection to the organization or work, they strongly believe they will recover from work [49]. Therefore, organizational psychological ownership can increase the resilience of psychological capital. Second, police officers with high organizational psychological ownership have a positive attitude towards specific things and have a more positive attribution to all things [18]. Thus, organizational psychological ownership can increase the optimism of psychological capital. Third, police officers with higher sense of organizational psychological ownership would have higher sense of responsibility and positive motivation to organization and work, and they would do their best to persist and to achieve their missions [18]. Hence, organizational psychological ownership can increase the hope of psychological capital. Fourth, police officers with higher perception of organizational psychological ownership would increase their self-confidence, because they realize that they have a greater control over things [18]. Therefore, organizational psychological ownership could increase the self-efficacy of psychological capital. Based on the aforementioned, police officers with higher perception of organizational psychological ownership would have a positive and proactive attitude to confront adversity [63,64]. Therefore, we postulate the following hypothesis: Hypothesis 1 (H1). Organizational psychological ownership is positively associated with psychological capital.

The Positive Influence of Organizational Psychological Ownership and Psychological Capital on Job Performance
Job performance is regarded as an important outcome variable of organizational performance and organizational behavior [11,[65][66][67]. Positive work outcomes, such as motivation, satisfaction, and performance, will be presented when "positive psychological states" are exhibited [68,69]. These positive psychological states include meaningfulness of the work and experiencing responsibility for the work [70,71]. Organizational psychological ownership has been identified as a motivation of employees to improve job performance [21]. Previous studies indicate that psychological ownership relates positively to job attitudes and work behaviors, such as job performance [72]. Md-Sidin et al. [73] also pointed out that organizational psychological ownership has positively significant relations to job commitment, job satisfaction, and performance. Hence, hypothesis 2 of this study is as follows: Hypothesis 2 (H2). Organizational psychological ownership is positively associated with job performance.
Employees with psychological capital are efficacious, optimistic, hopeful, and resilient, and filled with positive psychological resources [38]. Psychological capital is a critical resource that is utilized to organizational competitive advantage. Based on the conservation of resources theory, proactivity can maintain an individual's motivation and performance and can be used to help individuals face multiple challenges at work and enhance job performance [35,74,75]. Employees with higher psychological capital tend to have optimism, hope, and self-efficacy, exhibit resilience to persist in the face of challenges, and accomplish their own success [54].
The positive relationship between psychological capital and job performance is well established in the literature [76][77][78]. According to Bandura [79], employees with higher self-efficacy may have better performance, because they are more confident of taking on the challenge and demonstrating confidence in achieving their goals [80,81]. Luthans et al. [48] also indicated that psychological capital is positively related to job performance. Gooty et al. [77] indicated that employees with psychological capital exhibit better in-role performance. Avey et al. [78] also demonstrated the positive relationship between psychological capital and job performance. Based on the abovementioned, psychological capital has a positive relationship with job performance [48]. This current research employs the viewpoint of Luthans et al. [48] in defining psychological capital as a police officer's positive psychological state, enabling the individual to have sufficient psychological resources, and stimulating the individual towards his/her goal. Thus, police officers with higher psychological capital are more likely to have better job performance [70]. Hypothesis 3 of this study is as follows:

Hypothesis 3 (H3).
Psychological capital is positively associated with job performance.

The Positive Influence of Organizational Psychological Ownership and Psychological Capital on Organizational Citizenship Behavior
Konovsky and Pugh [82] argued organizational citizenship behavior is when a member of the organization undertakes responsibilities beyond the requirement of the job and does not receive rewards from the organization [83,84]. Organ [85] indicated organizational citizenship behavior means organizational members do not require rewards but are still willing to help their colleagues and the organization's development [86]. This study refers to the definition of Williams and Anderson [87], who stated organizational citizenship behavior could benefit the organization and be divided into intra-role behavior, organizational interest behavior, and interpersonal altruism behavior [88,89].
According to previous studies, organizational psychological ownership is associated with related individual's behavior [90]. Van Dyne and Pierce [21] had empirically identified a positive relationship between organizational psychological ownership, job performance, Sustainability 2021, 13, 2689 6 of 16 and organizational citizenship behavior. They indicated that employees with organizational psychological ownership have three main characteristics, which enable employees to express positive feelings and attitudes about tangible and intangible goals, which are followed by enhanced self-concept and making the members of the organization regard tangible and intangible goals as their own extension, and finally, a sense of responsibility, which encourages the members of the organization to assume the responsibility of protecting or defending their ownership [21]. Therefore, employees with organizational psychological ownership will regard themselves as the owner of the organization, thereby creating a psychological contract that strengthens the relationship between employees and the organization, so that employees are willing to go beyond their original roles and responsibilities, and are more willing to participate in the organization and organizational decision making [21]. Vande Walle et al. [91] also examined the relationships between psychological ownership and commitment and satisfaction to the cooperative and perceptions of extra-role behavior. Organizational psychological ownership results in behaviors that promote the belongingness to the organization and the achievement of organizational goals [92]. Hence, employees practice initiatives to improve the operation of their organization and present an organizational citizenship behavior when they regard the organization as an extension of themselves. Based on relevant researches, hypothesis 4 is as follows:

Hypothesis 4 (H4).
Organizational psychological ownership is positively associated with organizational citizenship behavior.
Based on the conservation of resources theory, individuals with high psychological capital can invest to acquire other resources and increase the accumulation of their own resources into their work [17,93]. Prior studies suggest employees with high psychological capital should have high organizational citizenship behavior [61,74]. To regain the accumulation of resources, employees with high psychological capital continue to invest positive resources in their work, thus exhibiting excellent organizational citizenship behavior [94]. According to relevant studies, positive attitudes, such as psychological capital, will positively associate with organizational citizenship behavior [71]. Therefore, hypothesis 5 is presented as follows: Hypothesis 5 (H5). Psychological capital is positively associated with organizational citizenship behavior.

The Mediating Effect of Psychological Capital on Organizational Psychological Ownership, Job Performance, and Organizational Citizenship Behavior
Organizational psychological ownership and psychological capital are both positive psychological constructs and result in positive organizational behavior, such as employees' performance, attitudes, and behaviors in the workplace [95]. Pierce et al. indicated that organizational psychological ownership could generate a stronger motivation, a more positive attitude, and a higher perception of responsibility [18]. Moreover, psychological capital is a kind of positive psychological energy manifested by individuals [96]. Luthans et al. [48] indicated that psychological capital presents individual motivation that would accrue through positive psychological states. Positive psychological state could stimulate individual's resilience [74], hope [97], and optimism [98]. Additionally, Pierce et al. [18] had demonstrated organizational psychological ownership would have positive correlation with psychological capital. Based on the abovementioned, this current study alleges when employees perceive the sense of organizational psychological ownership, their psychological capital is improved, which in turn motivates and facilitates their job performance and organizational citizenship behavior. Hypotheses 6 and 7 of this study are thus stated as follows: Hypothesis 6 (H6). Psychological capital has a mediating effect between organizational psychological ownership and job performance.

Hypothesis 7 (H7).
Psychological capital has a mediating effect between organizational psychological ownership and organizational citizenship behavior.

Sample and Data Collection
This study applied the questionnaire survey to verify the hypotheses and research framework. Respondents were informed that the survey was anonymous and were assured of the confidentiality. We followed the standard back-translation procedure to translate all items into Chinese [99]. In addition, we scrutinized the normal distribution test. The Kolmogorov-Smirnov value was 0.078 (p > 0.05), the kurtosis value was 0.357 (<10), and the skewness value was −0.257 (<|3|) [100]. Hence, the data should be normal distribution in the statistics. Afterwards, we used statistical software SPSS 20 and AMOS 18 for data analysis. With the assistance of the personnel director of the police department, we sent the questionnaires to the director of the police station, and the director distributed the questionnaires to the police officers of the patrol team. After filling out the questionnaire, the police officer put and sealed it in the envelope. Then the director sent the questionnaires back to the personnel director of the police department. Among the total of 550 copies distributed, 543 valid questionnaires were collected, resulting in a response rate of 98.7%. Most of the respondents were male (82.7%), and the largest proportion of respondents were between 41 to 50 years old (36.5%). Slightly less than half of the respondents had less than 10 years of work experience (47.6%). Additional details of the demographic profiles are provided in Table 1.

Measures
Organizational Psychological Ownership We adopted a seven-item and self-report measurement developed and validated by Van Dyne and Pierce [21]. The response format of organizational psychological ownership was a seven-point Likert-type scale (1, totally disagree, to 7, totally agree). Sample item was "I have a high sense of identity with the present police unit". The scale's reliability Cronbach's alpha was 0.90 in this research.
Psychological capital Psychological capital consists of four positive dimensions, resilience, optimism, hope, and self-efficacy. We adopted a self-report measurement of psychological capital developed and validated by Luthans et al. [48] to assess psychological capital. The response format of psychological capital was a seven-point Likert-type scale (1, totally disagree, to 7, totally agree). The measure combines the four dimensions of psychological capital. Sample item was "no matter what kind of work I do, I always think positively of it". The scale's reliability Cronbach's alpha was 0.95 in this research.
Job performance Job performance consists of three dimensions, work efficiency, work efficacy, and work quality. We assessed this variable using the scale developed and validated by Schermerhorn et al. [101]. Job performance could be assessed by supervisors, subordinates (self), and peers [102]. Considering the characteristics of police and avoiding the bias of supervisors, the response format of job performance was a sevenpoint Likert-type scale (1, totally disagree, to 7, totally agree) and peer-rated performance measure appraised by their colleagues. Sample item was "my colleague will complete his/her work in accordance with the standard operating procedures". The scale's reliability Cronbach's alpha was 0.87 in this research.
Organizational Citizenship Behavior Based on a study of Williams and Anderson [87], there are three dimensions of measuring organizational citizenship behavior, in-role behavior, organizational citizenship behavior of individuals, and the organizational citizenship behavior of organizations. The response format of organizational citizenship behavior was a seven-point Likert-type scale (1, totally disagree, to 7, totally agree). The measure combines the three dimensions of organizational citizenship behavior. Sample item was "I shall achieve the performance and standards set by my unit." The scale's reliability Cronbach's alpha was 0.93 in this research. Table 2 presents the means, standard deviations, composite reliability (CR), Cronbach's α, the average variance extracted (AVE), and correlation coefficient among the variables of this current study. All of the correlation coefficients between variables were medium correlations. The composite reliability values ranged from 0.76 to 0.91 in this study and were all above the minimum values of 0.70 as recommended [103]. The AVE of each construct exceeded the recommended value of 0.50 [103]. According to Hair et al. [104], the estimated inter-correlations among the variables were less than the square roots of AVE for each variable, which supported the discriminant validity of the scales.

Structural Model
The results of the model path analysis conducted in this study are presented in Figure 1. The standardized path coefficient (SPC) of the direct effect of organizational psychological ownership on psychological capital was statistically significant (SPC = 0.63, p < 0.001), whereas the direct effect of organizational psychological ownership on job performance and organizational citizenship behavior were not statistically significant, respectively (SPC = −0.06 and 0.02, respectively). Hence, hypotheses 1 was supported, but hypotheses 2 and 4 were not supported.

Mediating Effect
The direct effects of psychological capital on job performance and organizational citizenship behavior were statistically significant (SPC = 0.79 and 0.65, p < 0.001, respectively); therefore, hypotheses 3 and 5 were both supported. As exhibited in Figure 2, the standardized path coefficients (SPC) of the indirect effects were statistically significant (SPC = 0.79 and 0.64, p < 0.001, respectively). In addition, the Z values of H6 and H7 were 2.09 and 3.87, respectively, and the Z values were all above the threshold value of 1.96. Since these indirect effects were significant, psychological capital had a fully mediating effect between organizational psychological ownership, job performance, and organizational citizenship behavior. Therefore, hypotheses 6 and 7 were both supported, as presented in Table 3.

Mediating Effect
The direct effects of psychological capital on job performance and organizational citizenship behavior were statistically significant (SPC = 0.79 and 0.65, p < 0.001, respectively); therefore, hypotheses 3 and 5 were both supported. As exhibited in Figure 2, the standardized path coefficients (SPC) of the indirect effects were statistically significant (SPC = 0.79 and 0.64, p < 0.001, respectively). In addition, the Z values of H6 and H7 were 2.09 and 3.87, respectively, and the Z values were all above the threshold value of 1.96. Since these indirect effects were significant, psychological capital had a fully mediating effect between organizational psychological ownership, job performance, and organizational citizenship behavior. Therefore, hypotheses 6 and 7 were both supported, as presented in Table 3.
between Organizational Psychological ownership and Citizenship Behavior.

Discussion
For organizations, non-material effects, such as psychological effects, may be better than material effects, such as salary compensation, to retain talents. It is because material effects can be imitated easily, and even forms a vicious circle [97]. Positive job-related identity can make employees proud of being a part of their groups, and further facilitate their positive behaviors [28]. Therefore, organizational psychological ownership and psychological capital will be the critical factors to organizational sustainability and retaining talents [97].
In the working context, Dutton et al. emphasized the importance of positive job-related virtuous attributes [107]. As a kind of virtual ownership, organizational psychological ownership can not only influence the attitude, but also facilitate the positive behaviors of employees [108]. Based on the conservation of resources theory [17], the empirical results of this study reveal an incremental contribution by verifying effects of organizational psychological ownership on psychological capital, job performance, and organizational citizenship behavior. First, previous studies suggest organizational psychological ownership enhances individuals to have a high confidence and a highly positive attitude that may be related to psychological capital [52]. Based on the result of the current study, the higher the perception of organizational psychological ownership is, the more abundant the psychological capital is.
Second, an employee's positive psychological state characterized by efficacy, optimism, hope, and resilience [28]. This research also investigated the roles of psychological capital in predicting job performance and organizational citizenship behavior. Consistent with relevant researches of psychological capital [58,62], the results of this study reveal that the psychological capital of police officers is related to their job performance and organizational citizenship behavior.
In addition, employees experience either negative or challenging incidents in the workplace and damage their psychological resources. Past studies have examined the mechanisms of mediating effect of psychological capital, and illustrated social support is an important situational factor to influence the psychological capital, and in turn, to achieve job performance [28,109,110]. It seems integral for organizations to replenish the psychological resources of employees and keep them engaged at work in order to achieve organizational goals and sustainability. We suggested that organizational psychological ownership could help employees build positive psychological resources so that they can better handle positive behaviors to accomplish their goals. Our results

Discussion
For organizations, non-material effects, such as psychological effects, may be better than material effects, such as salary compensation, to retain talents. It is because material effects can be imitated easily, and even forms a vicious circle [97]. Positive job-related identity can make employees proud of being a part of their groups, and further facilitate their positive behaviors [28]. Therefore, organizational psychological ownership and psychological capital will be the critical factors to organizational sustainability and retaining talents [97].
In the working context, Dutton et al. emphasized the importance of positive job-related virtuous attributes [107]. As a kind of virtual ownership, organizational psychological ownership can not only influence the attitude, but also facilitate the positive behaviors of employees [108]. Based on the conservation of resources theory [17], the empirical results of this study reveal an incremental contribution by verifying effects of organizational psychological ownership on psychological capital, job performance, and organizational citizenship behavior. First, previous studies suggest organizational psychological ownership enhances individuals to have a high confidence and a highly positive attitude that may be related to psychological capital [52]. Based on the result of the current study, the higher the perception of organizational psychological ownership is, the more abundant the psychological capital is.
Second, an employee's positive psychological state characterized by efficacy, optimism, hope, and resilience [28]. This research also investigated the roles of psychological capital in predicting job performance and organizational citizenship behavior. Consistent with relevant researches of psychological capital [58,62], the results of this study reveal that the psychological capital of police officers is related to their job performance and organizational citizenship behavior.
In addition, employees experience either negative or challenging incidents in the workplace and damage their psychological resources. Past studies have examined the mechanisms of mediating effect of psychological capital, and illustrated social support is an important situational factor to influence the psychological capital, and in turn, to achieve job performance [28,109,110]. It seems integral for organizations to replenish the psychological resources of employees and keep them engaged at work in order to achieve organizational goals and sustainability. We suggested that organizational psychological ownership could help employees build positive psychological resources so that they can better handle positive behaviors to accomplish their goals. Our results demonstrated that psychological capital had fully mediating effects between organizational psychological ownership and job performance and organizational citizenship behavior. The current research used an integrated view to examine the effect of positive psychological states on relevant positive outcomes. In accordance with relevant postulations, these results correspond to the previous research outcomes [111]. Organizational psychological ownership enhances individuals' psychological capital, and in turn, positively affects their job performance and organizational citizenship behavior.

Managerial Implications
Sustainable management is a holistic approach within an organization and must consider the impact on externalities of society, economy, and the environment [112]. This study identified that psychological capital fully mediated the relationship between organizational psychological ownership, job performance, and organizational citizenship behavior. Employees' psychological capital is a useful personal resource that managers can leverage to integrate personal resources in order to enhance job performance and organizational citizenship behavior of police officers, even in an unfavorable circumstance or under stresses. Therefore, we should take the value of recruiting and retaining police officers who have high levels of psychological capital.
Second, according to previous studies, psychological capital had a positive relationship to job performance [113]. Luthans et al. [48] argued that the investment in psychological capital may yield more substantial feedback then the other traditional forms of capital investment. Psychological capital of employees can be developed through training initiatives [113]. As a result, to spur police officers' psychological capital, police departments have to offer relevant staff assistant initiatives to enhance the psychological capital of police officers.
Third, organizational psychological ownership is a key catalyst to influence the psychological capital of police officers. Supervisors should pay attention to enhance police officers' perception of belonging, efficacy, and self-identification in order to maintain a longterm stable organizational psychological ownership, and to promote the development of psychological capital, job performance, and organizational citizenship behavior. Van Dyne and Pierce [21] suggested that managers may want to pay attention to employees' feelings when employees' attitudes were critical to affect their work effectiveness. Thus, police departments must strive to enhance police officers' sense of organizational psychological ownership for the organization through improving the supervisor-subordinate relationship in the police internal leadership, and to enhance the cohesiveness of the organization. Further, police departments may empower police officers' autonomy and allow them to participate in decision making processes.
Fourth, the research has shown that police officers with organizational psychological ownership and psychological capital achieve better job performance and organizational citizenship behavior in a challenging work environment. Managers can influence the job demands and resources of police officers to mobilize their psychological resources through training initiatives. Thereafter, managers could assist police officers to build a clearer picture of using their strengths at work, and in turn, could improve their personal psychological resources, performance, and organizational citizenship behavior.

Limitations and Future Research
Several limitations should be recognized for future research. First, the sample of this study was collected from the police department, and the results could be affected because of the characteristics of the job of the police. Future studies can extend the framework of this study to verify the results to different occupations, industries, and countries. Second, this study used the cross-sectional data that can only explain the research at a particular moment. Future study should use longitudinal data to examine the relevant results. Third, human resource management had taken psychological capital as a powerful predictor of several positive outcomes. Thus, relevant practices should be met to achieve such capacities by focusing on what would improve or enhance psychological capital. The residual variance component of organizational psychological ownership, job performance, organizational citizenship behavior, and psychological capital indicated there might be other predictors, such as the supervisor-subordinate relationship or leadership, which can explain part of the variance in the relevant research. Therefore, further research could take other psychological variables or control variables that can explain the research model. Fourth, there are some aspects of organizational psychological ownership that may affect other important work outcomes through psychological capital in different work environments. Future research can extend the findings of this current study to verify the relationship with other relevant outcome variables. Fifth, the current study was in an Eastern-based work environment. Results may be diverse and varied due to different cultural impacts. Future research can take foci on cross-cultural comparisons to verify these results.

Conclusions
This study offers a valuable insight to extend research by investigating the unexplored, integrated effects of organizational psychological ownership, job performance, organizational citizenship behavior, and psychological capital. Using the theory of resource conservation as a conceptual framework, a specific recommendation from this research highlights a deeper understanding of the "black box" that links organizational psychological ownership to job performance and organizational citizenship behavior through psychological capital. According to the results of this research, positive psychology has presented in related fields such as positive organizational behavior. Employees with positive psychology may not feel frustrated despite being exposed to stressful situations and high working demands. It is because they may possess positive psychological characteristics that help them to recover immediately. Organizational psychological ownership and psychological capital, therefore, are both positive states to assist employees to face the challenging work environment or stressful circumstances.

Data Availability Statement:
The data used to support the findings of this study are available from the corresponding author by request.

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