Which of the following reasons is the most likely reason Dr. Elder conducted a factorial design? To determine whether a mediator was present in participantsa ability to categorize To test whether there is a difference between creating and searching for category members O To test whether there is a difference thinking about a category and thinking about a category and its opposite O To test whether task type interacts with the effect of activity focus QUESTION 31 In Dr. Elder's study, how many possible main effects exist? 00 00RESEARCH STUDY 12.1 Dr. Elder is interested in the way people recognize objects as members of categories. He is curious as to whether people think about categories in a more complex way if they contemplate an "opposite" category first. Dr. Elder has four groups of participants (with 20 people in each group). In Group A, participants were told to cut out pictures of dogs and cats from magazines. In Group B. participants were told to cut out pictures of just dogs from magazines. In Group C. participants were told to draw pictures of cats and dogs, In Group D, participants were told to draw pictures of just dogs. After doing this for 30 minutes, participants in all groups were asked to list the attributes that define the "dog" category. Having a higher number of attributes listed was considered to be an indication of thinking about the category in a more complex way, The results of his study are below. Type of Activity Cutting out Drawing Pictures Pictures Dogs and cats 15 9 Focus of the activity Dogs only 7 6 Refer to Research Study 12:1 to answer the following three questions Which of the following best describes Dr. Elder's study? O A2 x 2 within-groups factorial design A 2 x 2 independent-groups facional design A2 x 2 mixed factorial design A 2 x 4 within-groups factorial design