is the idea that prejudice and negative stereotypes decrease and racial-ethnic relations improve when people from different racial-ethnic backgrounds, who are of equal status, interact frequently. Group of answer choices Contact Theory Media Theory Disengagement Theory Activity Theory Next

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?