PSYC 355 SPSS CUMULATIVE ASSESSMENT INSTRUCTIONS (80 POINTS) The following research questions can be answered using 1 of the 5 tests you have learned so far: single-sample t-test, paired-samples t-test, independent-samples t-test, one-way ANOVA, or twoway ANOVA. Use the information in the tables to construct your SPSS data file, just as you have been doing in Part 2 of each homework assignment. There is only 1 correct choice of analysis for each question, and note that some tests are 1-tailed and some are 2-tailed. The assessment is open-book/open-notes. For each problem involving a test of significance, your answer must include: A) SPSS output; B) an appropriate graph from SPSS; C) a Results section in current APA style including a statistical statement (i.e., t(19) = 1.79, p = .049); a sentence summarizing the results \"in English\" (i.e., \"There was a significant difference between the two groups on the variable...\" or \"There was no significant difference...\"); and a decision about the null hypothesis. For ANOVA problems: Report statistical findings and make statements for all main effects and interaction effects. Use Tukey's test for any analyses requiring post hoc tests. Do not create a boxplot for the 2-way ANOVA--use the graph we typically use in the course for this type of test. Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 5. 1. An entrepreneur claims that he has developed a program that can increase the IQ of adolescent students. To test this claim, a psychologist administers the WISC (an IQ score for children) to a group of students before and after completing the training program. Analyze the data to test the entrepreneur's claim. Student IQ IQ after before 1 103 99 2 85 89 3 94 90 4 106 108 5 74 74 2. 6 98 99 7 83 80 8 93 99 9 103 107 10 96 93 11 109 111 12 115 117 13 86 83 14 122 122 15 112 120 Smoking Allowed 16 126 131 17 118 116 18 72 8 74 7 5 15 a) SPSS output (5 pts) b) SPSS graph (5 pts) c) APA-style Results section (6 pts) The staff at a local psychiatric facility wants to determine whether implementing a No Smoking rule significantly decreases the length of stay of inpatients. In order to test this claim, they compared the length of stay of patients admitted before a No Smoking rule was implemented to a different group of patients admitted after the No Smoking rule was implemented. Evaluate the claim that the average length of stay was significantly shorter for the group admitted after the facility implemented the rule. No Smoking 5 4 10 8 Page 1 of 4 PSYC 355 2 5 8 6 4 14 12 8 4 13 10 8 7 8 2 3 2 4 4 5 2 4 6 7 a) SPSS output (5 pts) b) SPSS graph (5 pts) c) APA-style Results section (6 pts) 3. Depressed patients are randomly assigned to 1 of 3 therapists. At the end of 3 months, each patient completes a standardized test of depression (higher scores indicate higher level of depression). The patients' scores are shown below. Analyze the data to determine how effective these 3 therapists are at treating depression (assume that before the treatment, all 3 groups of patients had the same average depression score). (16 pts) Therapist 1 35 37 35 37 36 33 39 Therapist 2 36 37 37 31 39 35 32 Therapist 3 29 32 25 28 33 30 32 a) SPSS output (5 pts) b) SPSS graph (5 pts) c) APA-style Results section (6 pts) Page 2 of 4 PSYC 355 4. In light of all the weight loss misinformation and fad diets, a medical researcher determines to evaluate several of them. She randomly assigns volunteers (identified as clinically obese) to 1 of 4 diets. She is a firm believer in the benefits of exercise, so she also assigns them to either the exercise or no exercise group. After 3 months, she compares the pounds lost for each condition. Was there a significant effect of the diets and exercise on weight loss? Low Carb Exercise No Exercise 26 28 30 25 20 15 20 18 South Beach 28 22 18 18 12 15 15 Adkins 25 21 24 29 17 19 28 25 21 Weight Watchers 28 28 30 25 26 34 25 30 28 a) SPSS output (5 pts) b) SPSS graph (5 pts) c) APA-style Results section (6 pts) 5. Infants exposed to cocaine in their mother's womb are thought to be at high risk for major birth defects. Thirteen infants born to mothers who are addicted to cocaine are administered the Brazelton Neonatal Assessment 1 day after birth. For these babies, their scores were as follows: Brazelton Scores 6.25 4.50 8.50 5.50 3.00 7.90 7.50 5.30 6.80 7.50 5.25 7.45 6.80 Page 3 of 4 PSYC 355 For the general population, babies normally score an 8.5. Is this group of babies significantly lower than normal? a) SPSS output (5 pts) b) SPSS graph (5 pts) c) APA-style Results section (6 pts) Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 5. Page 4 of 4