The relationship between nature exposure and depression among Chinese prisoners: a moderated mediation model

Front Psychol. 2024 Feb 21:15:1252864. doi: 10.3389/fpsyg.2024.1252864. eCollection 2024.

Abstract

Aim: This study examined the association between self-reported nature exposure and depression among Chinese prisoners, as well as the mediating and moderating effects of meaning in life and callous-unemotional (CU) traits, respectively.

Background: Prisoners are more likely to experience depression than any other mental illness. Exposure to nature has been proposed as a highly cost-effective method of treating their depressive symptoms. However, the mechanism underlying the link between nature exposure and depression among prisoners needs further investigation, as the findings may provide new insights into how to address depression in incarcerated populations.

Method: Data were collected through a survey conducted in four prisons in southern China from April to May 2022. The participants were 574 prisoners who anonymously completed four questionnaires about nature exposure, meaning in life, depression, and CU traits.

Results: The results show that: (1) meaning in life significantly mediates the association between nature exposure and depression, and (2) CU traits moderate the connection between nature exposure and meaning in life.

Conclusion: The current study uncovered that prisoners who contact more with the natural environment have a higher meaning in life and lower depression, and individuals with higher CU traits can benefit more from nature exposure.

Keywords: CU traits; depression; meaning in life; moderated mediation model; nature exposure.

Grants and funding

This study was funded by “the Fundamental Research Funds for the Central Universities” to AM (no. ZFYZ88001); the Humanities and Social Sciences Fund of the Chinese Ministry of Education to AM (no. 21YJAZH058); the Beijing Social Science Fund to AM (no. 21JYB010); the major project of the Chinese Ministry of Education, National Education Sciences Planning Fund to XL (no. DEA220353); the Joint Funds of the National Natural Science Foundation of China to AM (no. U2336213); the Ministry of Education 2022 annual “Chunhui Plan” cooperative scientific research project (no. HZKY20220051) to XL.