Bryan is angry at his parents, but when he joins his friends, he begins talking and laughing with them, and he becomes much happier. Social psychologists would say this is a result of: informational social influence

The appropriate response is a normative social influence. Normative social influence is a sort of social impact prompting congruity. It is characterized in social brain research as "the impact of other individuals that leads us to adjust keeping in mind the end goal to be loved and acknowledged by them".