Results of Repeated Measures Anova for FEIT 1

Results of Repeated Measures Anova for FEIT 1. What is the interpretation of the TX on FEIT scores from Tests of Between. Subjects and Within-Subjects Effects? 2. Is this statement correct: “On the FEIT, there was a significant main effect of group, F(1, 8) = 10. 02, p <. 05, with … SCITA … performing higher than …TAU…”? 3. What does “ 1” signify in (1, 8)? 2 groups 4. Where do you find main effect for time and group X time? Use this slide as an example of what is expected for SCIT-A tables.

Answers 1. What is the interpretation of the TX on FEIT scores from Tests of Between. Subjects and Within-Subjects Effects? • There was a significant group difference between those who had the tx and those who didn’t receive tx (TAU), F(1, 8)= 18. 03, with those in the tx group scoring higher on the FEIT than those in the TAU group. • There was no significant within subject effect for time (i. e. , pre-post test results, p=. 47) and no significant interaction within subject effect for time by group (p=. 34). • FYI re: interactions • Information about when interactions are significant: • Interaction means that the IVs are not independent. The IVs have a complex (interactive) influence on the DV. • An interaction means that the main effects can not be relied upon to tell the full story. When there is an interaction effect, it means the main effects do not collectively explain all of the influence of the IVs on the DV. • Best displayed graphically (at least for me) 2. Are results correctly stated in the study? No 3. What does “ 1” signify in (1, 8)? 2 groups

Cohen’s d • http: //www. uccs. edu/~lbecker/ • Enter means and standard deviations for each group. Use the chart to interpret the value.

Cohen’s d Interpretation

Assignment, Due July 22, online submission using Word • Assignment: • Run a Repeated Measure Anova results for SCIT-A. • Copy the following tables to Word: • Descriptive stats (1 pt) • Multivariate tests (within and between subjects results) (1 pt each) • Run a Cohen’s d test, take a screen shot, and copy to Word for submission. (1 pt) • Answer the following questions. • 1. What is the interpretation of the TX on SCSQ scores from Tests of Between-Subjects and Within-Subjects Effects? Write out as demonstrated on first slide. (2 pts each) 2. Why are the degrees of freedom (1, 9) different from those seen in FEIT results (1, 8)? (2 pts) 3. Interpret the Cohen’s result using table provided. (1 pt) 4. How does Cohen’s result differ from t-test, ANOVA results? (2 pt)

SPSS instructions for Repeated Measures ANOVA • • • 1. Analyze 2. General Linear Model 3. Repeated Measures 4. On Factor 1 enter 2 levels (pretest and posttest results) 5. Define 6. Move SCSQpre and SCSQpost into box labeled “Within subj variables” using the RIGHT arrow. 7. Move Group to “Between subj variables” with RIGHT arrow. 8. Options 9. Move OVERALL to box “Display means for” 10. Select “Descriptive Statistics” 11. CONTINUE 12. OK (runs analysis)