To examine the associations between pleasant or reinforcing activities (as they relate to the behavioral theory of depression) and depressive symptoms across cultures.

中文翻译：

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对愉快事件和抑郁症状的跨文化检查

检查愉快或强化活动（因为它们与抑郁症的行为理论有关）与跨文化的抑郁症状之间的关联。