And one thing I would strongly suggest is to form some sort of study groups, either formally or informally.

我强烈建议大家建立一些学习小组,正式的或非正式的都可以

耶鲁公开课 - 心理学导论课程节选

There is social, which is the study of how people act in groups, how people act with other people.

还有社会心理学,主要研究人类的群体行为,如何与他人交流

耶鲁公开课 - 心理学导论课程节选