I suspect that if physics and/or CS students were required to take part in at least one study per class per semester (like psychology students - this may have changed since I last took a psych course), then I suspect that the results of university psychology studies would have greater representation.
Technically, people participating in those studies are supposed to be volunteers. Although if part of your "class participation" grade is a result of "doing" a study, then it might not be totally voluntary. And if those studies are unpleasant enough, then you really don't want to be a senior or graduate psych student actually trying to run those experiments.
Technically, people participating in those studies are supposed to be volunteers. Although if part of your "class participation" grade is a result of "doing" a study, then it might not be totally voluntary. And if those studies are unpleasant enough, then you really don't want to be a senior or graduate psych student actually trying to run those experiments.