Practice Exam 2 - key - Winter 2009

Practice Exam 2 - key - Winter 2009 - ANSWERS TO PRACTICE...

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ANSWERS TO PRACTICE QUESTIONS FOR EXAM 2 For most of the practice question below, the correct alternative appears underlined; for some, the answer is stated in words surrounded by asterisks (**). To optimize your learning and thus your performance on the actual Exam 2, you should first try to answer these questions on the form of the exam that does not indicate the correct alternatives. 1. An experiment with a factorial design has at least a. two independent variables b. four conditions or treatment combinations c. two dependent variables d. all of the above e. a and b above The next 7 questions are related to the following paragraph Dr. Bliss, a clinical psychologist, wants to know if cognitive therapy or anti-depressants are more effective in treating individuals with depression. She randomly assigns people with depression to one of four conditions: no therapy and no anti-depressants; no therapy and anti-depressant; therapy and no anti-depressants; therapy and anti-depressants. Subjects in the last group will receive therapy at the same time that they are taking anti-depressants. 2. What type of design is Dr. Bliss using? a. within-subjects factorial design b. within-subjects quasi-experiment c. between subjects factorial design d. between subjects quasi-experiment e. correlational design 3. If Dr. Bliss wants 10 subjects per condition, how many total subjects does she need for this study? a. 10 b. 20 c. 40 d. 80 e. 30 4. In this study, Dr. Bliss will need to control for ___ . To do so she should use ____ . a. order effects ; counterbalancing b. experimenter bias; researchers who are blind to the purpose of the study c. specific item effects; a placebo d. carryover effects; random assignment of subjects to conditions e. both a and b above 5. What statistical analysis is appropriate for this study? a. independent samples t test b. two-way within subjects ANOVA c. one-way between-subjects ANOVA d. two-way between-subjects ANOVA e. dependent samples t test
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Use the following comparisons between conditions to answer the next three questions. a. therapy-no antidepressants compared with no therapy-no antidepressants b. no therapy-antidepressants compared with no therapy-no antidepressants c. therapy-no antidepressants compared with no therapy-antidepressants d. therapy-antidepressants compared with no therapy-no antidepressants 6. Which condition cell means should be compared to ascertain the effects of both therapy and antidepressants on depression? **(d) above is the correct choice ** 7. Which condition cell means should be compared to ascertain the effect of therapy alone on depression? **(a) above is the correct choice ** 8. Which condition cell means should be compared to ascertain the effect of antidepressants alone on depression? **(b) above is the correct choice ** ----------------------------------------------------------------------------- 9. Which of the following statements are true regarding differences between true experimental research and quasi-experimental research
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Practice Exam 2 - key - Winter 2009 - ANSWERS TO PRACTICE...

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