Courtney is enrolled in an advanced physics class at her high school. she is one of only three girls in the class and she is aware of the notion that girls perform more poorly in math and science than boys. this knowledge may actually hinder courtney's performance in the class as a result of:

"six months ago, several of molly's friends joined the trimtime fitness center. each of them participated in trimtime's weight-reduction and fitness regimen. all reported substantial weight reduction, and all are visibly slimmer. molly is convinced. she joins trimtime and enrolls in the program, hoping and expecting to see the same results. she is especially delighted to learn that trimtime had adjusted its program to make it even more effective in a shorter period of time." what is the feature in question/attribute of interest in this argument?