After a group of gang members learned that their friend had died in a seemingly random accident, several of the friends started blaming a rival gang for the death. Even though there was no evidence whatsoever that the death had been intentional, the more the friends talked, the more passionate they became in their belief that an act of revenge was necessary. What concept from social psychology may contribute to an act of violent revenge in this case

Groupthink

Explanation:

Based on the scenario being described within the question it can be said that the social psychology concept that would contribute to this is known as Groupthink. This describes that phenomenon in which the desire for a group of individuals to get along leads to that group making irrational or dysfunctional decisions. Such as an violent act of revenge.

sir frederic attributed inaccuracies to schemas. memory reconstruction is one part actual events and one part personal schema, which can result in inaccuracies when memories are reconstructed.