You may be thinking of "affectation," thoughas in definition 1. Though it differs slightly in its connotation. Affectation, affectation has to do with pretense and attempting to project a particular appearance or generate a particular perception. Many people do things for affectationaffectedly so that they can be perceived as being a part of the mainstream or "going along with the crowd," even if they don't genuinely understand what they're doing.