Do residents in proximity to blue spaces exhibit lower emotion-related impulsivity? The mediating role of perceived crowdedness

Abstract Background Emotion-related impulsivity (ERI) is a significant predisposing factor for various mental health issues and is influenced by individuals' immediate environment. Previous research has largely focused on mitigating ERI through individual-level interventions without extensively considering the role of the external environment. This study explores the impact of passive blue space exposure (PBSE) on ERI, considering both subjective and objective measures of PBSE and investigating the mediating role of perceived crowdedness. Methods Two studies were conducted using online platforms to collect data from Chinese residents. Study 1 (n = 369) examined the predictive effect of objective PBSE, as assessed by the normalized difference water index (NDWI), on ERI. Study 2 (n = 374) focused on subjective PBSE and the mediating effect of perceived crowdedness on ERI. Descriptive statistics, correlational analyses, and path analyses were employed to evaluate the relationships between PBSE, perceived crowdedness, and ERI. Results Study 1 demonstrated a negative correlation between objective PBSE and ERI, with marginal significance in predictive analysis after controlling for covariates. Study 2 revealed that subjective PBSE was significantly negatively associated with ERI, and perceived crowdedness significantly mediated this relationship. Subjective PBSE reduced perceived crowdedness, which in turn decreased ERI, accounting for 20% of the total effect. The findings suggest that PBSE, both objective and subjective, may serve as a protective factor against ERI. Conclusions This research highlights the negative association between PBSE and ERI, extending the understanding of environmental influences on impulsive behavior. It emphasizes the potential of utilizing blue spaces in urban planning and individual exposure to alleviate impulsivity. The study also sheds light on the importance of considering both subjective and objective environmental factors in psychological research and interventions. Future studies should consider a comprehensive approach to measuring PBSE and explore causal relationships through experimental designs.