Which of the following statements is (are) true? according to mahoney and avener’s study, gymnasts who qualified for the 1976 olympic team tended to use external imagery. external imagery refers to viewing yourself from the perspective of an external observer. external imagery produces significantly better performance than internal imagery. a and b b and c

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?