While shopping for groceries, abby realized she had misplaced her shopping list. by mentally visualizing the aisles she had walked and the items she had looked at, she was able to recall the exact shelf space where she had placed the list. her mental visualization most clearly involved

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?