LAUSR

The aim of the present study was to investigate associations of the balance of optimism and pessimism orientations as personal traits with pro-environmental behavior and subjective well-being, i.e., life satisfaction. A longitudinal questionnaire survey consisting of two waves were conducted with Japanese respondents within an interval of 3 months (N = 770, mean age 49.6 ± 15.23 years). Correlation analyses and structural equation modeling were conducted to identify relationships between pro-environmental behavior and positive and negative psychological states and orientations. Results of both the two surveys indicated positive correlations of optimism–pessimism orientation (O/P ratio) and subjective well-being with pro-environmental behavior. Negative associations were also confirmed between depression, stress, and sleepiness and pro-environmental behavior. Structural equation modeling using the two-wave data revealed that O/P ratio is positively associated with pro-environmental behavior as longitudinal associations. These results suggest that O/P ratio can be related to current and future engagement in pro-environmental behavior and improvement in subjective well-being which could lead to an environmentally sustainable society with enhanced quality of life.