"Affectation" refers to when someone pretends to have a certain characteristic or behavior in order to impress others, but it is not genuine or natural to them. It can be described as putting on a fake or insincere display. Full definition
Vintage - inspired photoshoots ran amok, as they would for Jessica Chastain, another seemingly overnight - success redhead, half a decade later, hailed with affectations of being otherworldly and somehow more innocent as a result. (lwlies.com)
There's a long monologue just before the roadshow version's Intermission (which feels like affectation, let's be honest; this ain't The Sand Pebbles — why does it want to be?) (filmfreakcentral.net)
On the contrary, one who without affectation says that he is in despair is after all a little bit nearer, a dialectical step nearer to being cured than all those who are not regarded and do not regard themselves as being in despair. (religion-online.org)