1. Introduction
Urbanization occupies a significant position on the global political agenda and continues to accelerate rapidly. Currently, approximately 55% of the world’s population resides in urban areas, and this figure is projected to exceed 68% by 2050 [
1]. The increasing pace of urbanization has led to a range of challenges, including environmental pollution, the densification of living spaces, the reduction in green areas, and a growing disconnection from nature. These factors have contributed to a variety of adverse effects on individuals’ physical and mental health [
2,
3,
4,
5]. Inhabitants of large metropolitan areas are increasingly subjected to environmental and social stressors—such as persistent noise exposure, air pollution, social isolation, and chronic psychological strain—all of which are recognized contributors to the prevalence of mental health disorders and symptoms indicative of burnout in urban populations [
6,
7,
8]. Consequently, there is a growing need for accessible and effective strategies to enhance psychological resilience.
In response to these challenges, the World Health Organization (WHO) launched the “Healthy Cities” initiative to promote urban environments that support residents’ physical, mental, and social well-being [
9]. This initiative underscores the importance of designing urban spaces that enhance quality of life. Nature-based solutions have emerged as key strategies in achieving this goal. These approaches have been shown to support individuals’ psychological well-being, particularly in the aftermath of stressful life events [
10,
11,
12,
13,
14,
15].
Urban forests serve as critical settings for ecological sustainability and provide opportunities for residents to engage with nature, facilitating mental restoration and psychological healing [
16,
17,
18,
19,
20]. Research consistently demonstrates that green spaces play a vital role not only in promoting physical health but also in enhancing subjective well-being (SWB) [
21,
22,
23,
24]. SWB is a multidimensional construct encompassing life satisfaction, the predominance of positive emotions, and a sense of meaning and purpose in life [
25,
26,
27,
28,
29,
30,
31].
In recent years, the concept of quality of experience (QE) has emerged as an important factor in understanding the benefits of green spaces. QE encompasses elements such as environmental aesthetics, accessibility, perceived safety, opportunities for social interaction, and spatial satisfaction. Studies have reported that these components positively influence both restorative experiences (RE) and SWB [
32,
33,
34]. High-quality nature experiences are associated with increased mental clarity, tranquility, and psychological renewal, all of which contribute to improvements in SWB [
32,
35].
Several studies suggest that spending time in natural settings such as urban forests may significantly enhance life satisfaction and happiness [
36,
37,
38,
39,
40,
41]. However, further empirical evidence is needed to clarify the mechanisms through which these effects occur. In particular, it remains unclear whether the impact of QE on SWB is direct or mediated by RE. Moreover, recent literature highlights that post-COVID-19, individuals’ engagement with outdoor and green spaces has significantly increased, reinforcing the relevance of such research for contemporary urban life [
42,
43,
44].
Therefore, the present study examines the effects of QE in urban forests on RE and SWB. A structural equation model (SEM) is applied to test the potential mediating role of RE in the relationship between QE and SWB. This study seeks to provide evidence-based insights into the psychological benefits and restorative potential of urban green spaces, ultimately contributing to nature-based urban planning and policies that support individual and societal well-being.
3. Methodology
3.1. Research Design
This study employed a quantitative research method to examine the relationships among QE, RE, and SWB. A correlational research design, supported by Structural Equation Modeling (SEM), was adopted for the investigation. The correlational design is a widely used method for examining the strength, direction, and nature of relationships between two or more variables. This model enables the examination of patterns of mutual variation between individuals or objects and is typically structured around correlation and comparison analyses [
84,
85].
Accordingly, data pertaining to participants’ experiential and psychological states were gathered through the use of validated psychometric instruments, and statistical analyses were conducted to examine the significance of relationships among the study variables. Furthermore, this research design facilitates empirical inferences regarding the associations between latent constructs, albeit without asserting direct causality. The study is situated within the framework of naturalistic, setting-based survey research, offering a context-sensitive approach to understanding how nature-based public environments—such as urban forests—influence subjective well-being in real-life conditions.
3.2. Participants
The study sample consisted of 385 participants (55.6% female, 44.4% male). The majority were adults aged 18–64 years (94.3%), with a smaller proportion aged 65 and above (5.7%). Additional demographic characteristics, including marital status, employment, and income levels, are summarized in
Table 1.
The demographic profile of the sample shows broad similarities with the population structure of Konya’s metropolitan center (Meram, Selçuklu, and Karatay districts). According to official statistics, the gender distribution in the metropolitan population is balanced (approximately 49% female, 51% male), which is consistent with the sample (55.6% female, 44.4% male). Likewise, the majority of the population falls into the working-age group (18–64 years), aligning with the age distribution of the sample (94.3%). Minor deviations (e.g., slightly higher female participation and a younger concentration) reflect the actual visitor profile of the urban forest.
3.2.1. Sampling and Procedure
A non-probability convenience sampling method was employed due to practical constraints of time and accessibility. This approach enabled direct access to the target population but inherently limits the generalizability of the findings. Inclusion criteria required participants to be adults (18 years or older) who had just completed or were in the process of visiting the urban forest and who voluntarily consented to participate. No exclusion criteria related to gender, education, or occupation were applied.
3.2.2. Ethics
Prior to data collection, all participants were fully informed about the purpose, scope, and voluntary nature of the research, and explicit informed consent was obtained. The study complied with the ethical principles of the Declaration of Helsinki. Data collection was conducted during the spring and summer of 2024, representing typical visitation periods.
3.3. Study Area
This study was conducted in the Konya Urban Forest, located within the boundaries of Meram district in Konya, the sixth most populous city in Türkiye. With a population of approximately 348,000, Meram occupies a strategic position in meeting the city’s overall need for green space.
The Konya Urban Forest was established in 2005 by the Konya Metropolitan Municipality on a forested area covering 5.27 km2. It is a public and freely accessible green space. The site offers a variety of recreational amenities, including walking trails, picnic areas, ponds, gazebos, football and basketball courts, and viewing terraces, providing diverse leisure opportunities for visitors.
Situated approximately 25 km from the city center and along the Konya–Beyşehir highway, the urban forest is easily accessible and attracts significant recreational use throughout the year. Despite high visitor density, particularly on weekends, the site is noted for its quiet and tranquil atmosphere. The area hosts a rich and diverse vegetation structure, composed of approximately 180 native plant species, including dominant tree types such as pine, oak, and cedar, along with numerous endemic species. Additionally, two ponds—measuring 11,000 m2 and 4000 m2, respectively—enhance the ecological richness and visual diversity of the forest.
As one of the officially designated “urban forests” in Türkiye, the Konya Urban Forest is managed under a protocol between the General Directorate of Forestry and the Konya Metropolitan Municipality. The site is officially designated as an urban forest but geographically located in a peri-urban area within Meram District, Konya, Türkiye. Like other urban forests across the country, this area plays a critical role in improving air quality, mitigating the urban heat island effect, ensuring accessible green spaces, and enhancing the physical, mental, and social well-being of urban residents (
Figure 2).
3.4. Measures
This study utilized a structured questionnaire comprising both demographic and psychometric instruments to assess the constructs of QE, RE, and SWB in the context of urban nature recreation.
3.4.1. QE Scale
To measure the construct in question, a six-item original measurement tool was developed based on previous research in the field of experiential evaluation. The items reflect dimensions such as meaningfulness, immersion, and aesthetic satisfaction of the experience.
3.4.2. RE Scale
The RE scale was adapted from established instruments developed by [
76,
86], which are grounded in the Attention Restoration Theory (ART). The items aim to measure cognitive and emotional restoration following exposure to natural environments.
3.4.3. SWB
The SWB construct was assessed through a composite approach including the following subcomponents:
Life Satisfaction (LS): Adapted from the Satisfaction With Life Scale (SWLS), 5 items were modified to reflect participants’ satisfaction following the urban forest experience.
Positive (PA) and Negative Affect (NA): Based on the Positive and Negative Affect Schedule (PANAS), 6 items (3 positive and 3 reverse-coded negative) were used to evaluate emotional responses after the forest visit. Affect Balance scores were calculated by subtracting the negative affect score from the positive affect score.
Meaning and Happiness (MH): Five original items were developed to assess participants’ perceived sense of meaning in life and emotional fulfillment following their forest experience. These items reflect the perceived influence of the experience on life meaning, inner peace, and emotional coherence.
A composite formula was used to compute the total SWB score:
This total score was used in the statistical analyses as the dependent measure of SWB.
All items were rated on a 5-point Likert scale (1 = Strongly Disagree to 5 = Strongly Agree). The reliability of all scales was tested, and Cronbach’s alpha coefficients indicated satisfactory internal consistency. Furthermore, the measurement model was evaluated using Confirmatory Factor Analysis (CFA), and the structural model was tested via Structural Equation Modeling (SEM). The constructs and their supporting literature are summarized in
Table 2.
3.5. Data Collection
Data were collected between April and June 2024 during participants’ visits to the Konya Urban Forest. A structured, face-to-face questionnaire was administered on-site using paper-based survey forms. The data collection was carried out by a trained research assistant (undergraduate student) under the supervision of the lead researcher. Surveys were conducted between 9:00 a.m. and 7:00 p.m. on both weekdays and weekends to capture a diverse sample of visitors.
Prior to participation, individuals were fully informed about the purpose and scope of the study, the voluntary nature of their involvement, and their right to withdraw at any stage without penalty. Verbal informed consent was obtained in line with ethical research standards. Anonymity and confidentiality were strictly maintained throughout the process.
The questionnaire comprised items assessing participants’ demographic characteristics, QE, RE, and SWB (
Table 3).
4. Results
The findings of the study support the theoretical framework and reveal significant associations among QE, RE, and SWB. The adequacy of model fit indices and the statistically significant results for the hypothesized paths provide a robust basis for further discussion of the effects of urban green space experiences on individual well-being. This section presents descriptive statistics, correlation analyses, regression models, and SEM results, followed by their theoretical and practical implications.
4.1. Descriptive Statistics and Correlations
Descriptive statistics for the main study variables are summarized in
Table 4 (see also
Table 1 for demographic details of participants). Item-level means, standard deviations (SD), skewness, and kurtosis values indicated that all skewness values fell within the acceptable range of ±1, and kurtosis values were within ±2. These results satisfy the criteria for univariate normality [
100], confirming that the data were suitable for subsequent parametric analyses.
Table 5 presents the Pearson correlation coefficients among the latent constructs. Statistically significant correlations at the 0.01 level were observed, providing empirical support for the proposed framework. For example, LS and PA were strongly and positively correlated (r = 0.65), while both were negatively correlated with NA (r = −0.60 and −0.58, respectively). QE showed positive associations with both RE (r = 0.82) and SWB indicators, suggesting meaningful interrelationships among these constructs.
4.2. Hierarchical Regression Analysis Results
The hierarchical regression analysis showed that the control variables (income, profession, and visit frequency) accounted for 15.6% of the variance in Subjective Well-Being (SWB). When Quality of Experience (QE) was included in the second step, the proportion of explained variance increased to 19.5% (ΔR
2 = 0.039,
p < 0.001; see
Table 6).
As shown in
Table 7, income was statistically significant in Model 1 (β = 0.13,
p < 0.05), but this association became non-significant after Quality of Experience (QE) was entered in Model 2 (β = 0.10,
p = 0.074). Visit frequency remained the strongest correlate across both models (β = 0.33,
p < 0.001). Importantly, Quality of Experience (QE) was also positively associated with Subjective Well-Being (SWB) (β = 0.20,
p < 0.001), indicating its unique contribution beyond socioeconomic variables and visit frequency.
4.3. Measurement Model
Confirmatory Factor Analysis (CFA) was conducted to evaluate the measurement properties of the study constructs. All standardized factor loadings exceeded the recommended threshold of 0.70 (see
Table 8), supporting indicator reliability and convergent validity. In addition, internal consistency and convergent validity were further confirmed by Cronbach’s alpha (α), McDonald’s omega (ω), and Average Variance Extracted (AVE) values, all of which met or exceeded the recommended cut-off criteria (α, ω ≥ 0.70; AVE ≥ 0.50). These findings provide strong evidence of the reliability and construct validity of the scales used in this study. Detailed results are presented in
Table 8 (factor loadings) and
Table 9 (reliability and validity indices).
Table 9 presents internal consistency and convergent validity indicators for each latent construct. Cronbach’s Alpha (α), McDonald’s Omega coefficients (ω
1, ω
2, ω
3), and Average Variance Extracted (AVE) values are reported. All constructs meet the recommended thresholds (α, ω ≥ 0.70; AVE ≥ 0.50), indicating satisfactory reliability and convergent validity [
101,
102,
103].
4.4. Structural Model
Structural equation modeling (SEM) results revealed significant relationships among the study constructs. Quality of Experience (QE) had a strong positive effect on Restorative Experience (RE), and both QE and RE significantly predicted Subjective Well-Being (SWB). Moreover, RE was found to partially mediate the relationship between QE and SWB. These findings highlight the critical role of restorative processes as psychological mechanisms linking environmental experiences to well-being outcomes.
The structural model demonstrated an acceptable fit to the data, with all indices exceeding recommended thresholds (CFI = 0.948, TLI = 0.943, RMSEA = 0.055, SRMR = 0.040) (
Table 10). Standardized path coefficients (
Table 11), explained variances (R
2 values,
Table 12), and hypothesis testing results (
Table 13) further confirm the robustness of the proposed model.
Table 11 presents the standardized path coefficients (β) estimated from the structural equation model. All path coefficients were statistically significant at
p < 0.001, indicating meaningful relationships among the constructs. For example, Experience Quality had a strong direct effect on Restorative Experience (β = 0.54), and both Experience Quality and Restorative Experience significantly predicted Subjective Well-Being. Negative Affect was negatively associated with SWB. These results provide support for the hypothesized model structure [
104], as illustrated in
Figure 3.
This SEM illustrates the direct and indirect relationships between QE, RE, and SWB among users of the urban forest. In this model, SWB is conceptualized as a latent construct composed of four subdimensions: LS, PA, NA, and MH. Each latent variable is represented by its respective observed indicators (M1–M31), enabling a comprehensive measurement of the underlying psychological constructs.
The coefficient of determination (R2) values provide insight into the proportion of variance in each endogenous (dependent) variable that is accounted for by the structural model. Specifically, the model explains 70.1% of the variance in SWB, indicating a substantial explanatory capacity. RE construct demonstrated a notably high R2 value of 0.913, reflecting strong predictive power. Additionally, the observed R2 values for the SWB subdimensions were also substantial: MH = 0.903, LS = 0.832, PA = 0.762, and NA = 0.709. These values suggest that the latent constructs are well-represented in the model and that the measurement model possesses strong construct validity and explanatory adequacy.
The findings of the structural equation model reveal that QE significantly predicts both RE and SWB. RE also has a significant positive effect on SWB. Furthermore, the results indicate that RE partially mediates the relationship between QE and SWB. All hypothesized paths were found to be statistically significant and thus supported (
Table 13).
5. Discussion
This study employed SEM to examine the relationships between QE, RE, and SWB in the context of urban forest recreation. The findings indicate that QE significantly influences both RE and SWB, aligning with a growing body of literature on the psychological benefits of natural environments [
14,
17,
19]. By fostering environmental aesthetics, engagement, and perceived meaning, QE promotes a positive internal state that enhances indicators of well-being such as life satisfaction [
15].
The correlation results further support the theoretical framework. Strong positive associations were observed between LS and PA (r = 0.65), while both variables were negatively related to NA (r = −0.60 and −0.58). These findings corroborate the dual-structure model of SWB emphasized in the literature and are consistent with theoretical approaches proposed by Diener (2000) [
26]. Moreover, the very strong correlation between QE and RE (r = 0.82) highlights that more meaningful and engaging experiences in urban forests are closely linked with higher levels of psychological restoration [
105].
SEM results revealed that QE had a strong effect on RE (β = 0.893,
p < 0.001), confirming that aesthetically pleasing and engaging natural environments promote restoration [
31]. QE functions as a comprehensive evaluative process, operating at both cognitive and emotional levels, and thereby directly enhancing SWB. In line with Kaplan’s ART and subsequent studies [
19,
31], natural settings provide mental relaxation and sensory coherence, reinforcing that urban forests are not only ecological spaces but also restorative environments. These findings support Hypothesis 1 (H1) and align with prior frameworks [
81,
84].
RE was also found to have a significant positive effect on SWB (β = 0.200,
p < 0.001), supporting the proposition that nature interaction facilitates mental recovery [
17,
76,
80]. Similarly, the direct effect of QE on SWB was significant (β = 0.596,
p < 0.001), echoing prior evidence on the psychological impacts of environmental quality [
15,
106]. Thus, QE emerges not merely as an aesthetic factor but as a structural determinant of psychological well-being. These findings strongly support Hypothesis 3 (H3). Furthermore, RE partially mediated the QE–SWB relationship (β = 0.178,
p = 0.028), consistent with mediation models suggested in earlier research [
18,
20,
107]. However, the stronger direct effect of QE underscores its central role in shaping well-being. This supports Hypothesis 4 (H4) and aligns with nature-based mediation mechanisms proposed by Bratman et al. (2019) [
6].
Overall, the results demonstrate that QE strongly predicts RE and exerts both direct and indirect effects on SWB. While RE plays a meaningful mediating role, the influence of QE on SWB remains stronger, suggesting that experiential quality directly enhances well-being while restorative processes provide additional, secondary benefits.
These findings highlight the importance of prioritizing experiential quality in urban forest planning, alongside accessibility and infrastructure. Features such as safety, aesthetic coherence, and opportunities for social interaction should be regarded as essential in maximizing psychological benefits.
Beyond individual outcomes, the Konya Urban Forest must also be understood within the broader metropolitan recreational landscape. As a peri-urban green space, it not only serves local residents but also attracts visitors across the Konya metropolitan region. Similarly to other rapidly urbanizing Anatolian cities, forest parks act as substitutes for limited urban parks, offering affordable, family-oriented, and accessible leisure opportunities. In this sense, the Konya Urban Forest represents a hybrid recreational pattern where traditional activities such as picnicking coexist with more individualistic pursuits such as walking, sports, and nature appreciation. Recognizing these dynamics underscores the forest’s disproportionate importance in shaping subjective well-being compared to typical urban green spaces.
5.1. Limitations
Despite providing valuable insights, this study is subject to limitations. First, the sample was limited to visitors of a single urban forest, reducing generalizability to other cultural or socioeconomic contexts. Second, its cross-sectional design prevents causal inference. Third, reliance on self-report measures introduces potential biases such as social desirability and recall errors. Fourth, environmental variables (e.g., noise, air quality, visit duration) were not controlled and may have influenced experiences. Fifth, data were collected in spring and summer, so seasonal variations were not captured. Finally, because data were collected immediately after the visit, the duration of restorative effects could not be evaluated. Longitudinal studies are needed to examine whether these effects persist over time.
5.2. Future Research Directions
Future studies should address these limitations by employing longitudinal designs to clarify causal pathways and test whether the effects of QE and RE on SWB endure over time. Cross-cultural and multi-site studies would enhance external validity and allow comparative analyses, especially in high-density metropolitan contexts. Supporting evidence for such cultural validation is provided by multi-country research showing consistent well-being outcomes across populations [
108] and studies highlighting geographical and cultural variations in perceptions of urban green spaces [
109].
In addition, incorporating socioeconomic variables and visit frequency as covariates would yield a more nuanced understanding of SWB. Expanding data collection across different seasons could capture seasonal variations in experiential quality and restoration.
Another promising direction is integrating objective physiological or behavioral indicators (e.g., heart rate variability, cortisol, or activity tracking) alongside self-reports. Environmental features such as biodiversity, vegetation density, and soundscapes should also be considered, as they may differentially contribute to restoration. Future research could also use control groups, experimental designs, and therapeutic nature-based interventions to provide stronger causal evidence.
Finally, economic perspectives should be integrated, such as estimating potential healthcare cost reductions associated with additional hectares of urban green space, thereby providing more persuasive evidence for policymakers and urban planners.
6. Conclusions
This study explored the relationships between QE, RE, and SWB in the context of a single urban forest by employing SEM. The findings provide evidence that QE may contribute to SWB both directly and indirectly through RE, with RE acting as a partial mediator. These results suggest that high-quality experiences in nature can foster subjective well-being not only via restorative mechanisms but also through meaningful, aesthetically rich, and engaging interactions with the environment.
The study highlights the critical role of urban forests not only as ecological assets but also as spaces that enhance psychological and social health. Accordingly, urban planning and policy efforts should prioritize not only the quantity of green areas but also their qualitative features—such as safety, accessibility, aesthetic coherence, and opportunities for social interaction—that enable emotionally fulfilling and restorative experiences.
Future studies should expand on these results by including multiple study sites, diverse demographic groups, and different sociocultural contexts, as well as adopting longitudinal or experimental designs, to further validate and generalize the observed relationships.