this study compared seasonal affective disorder (sad), nonseasonal depression, sub-syndromal sad, and control groups on dysfunctional eating cognitions and behaviours, physical activity levels, cognitive content specificity to winter stimuli, interpersonal context-specificity, response styles to depressed mood, and general negative attitudes. study participants : 阿根廷vs墨西哥竞猜 世界杯2022赛程表淘汰赛 and staff and residents of thunder bay, northwestern ontario, canada.