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Next, to examine group differences for each DV, follow-up separately univariate ANOVAs were conducted. The results indicated a strong association between treatment group and the combined DVs, and accounted for approximately 62% of the variability (ηp2 =. Using the Wilks' criterion, the combined DVs were significantly affected by treatment group, Wilks Λ =. 691), indicating equality of variances- covariances among the three DVs across the three treatment groups. And, Box's M test was non-significant (p =. Levene's test for homogeneity of variance failed to detect any significant between group differences for any of the DVs using the 5% level of significance. There were no univariate or multivariate within-group outliers with alpha set at. Means, Standard Deviations, and Intercorrelation for Dependent VariablesĮxploratory data analyses indicated that within each treatment group the three DVs met the assumption of univariate normality based on the results of the Shapiro-Wilks test for normality with alpha set at the 5%-level. Table 2 presents means and standard errors for the DVs broken-down by treatment group. 87 and justified the use of MANOVA to reduce the Type-I error rate. As reported in the table, the inter-correlations between the DVs were high, significant (p <. The overall means, standard deviations, and intercorrelation for the three DVs are presented in Table 1. Three dependent variables (DVs), that measured the severity of behavioral, cognitive, and emotional indicators of depression, were employed to assess the effectiveness of treatment.
#Spss code for manova software
All statistical analyses were conducted using the SPSS v 23 software (see data in Appendix 1, and SPSS syntax commands in Appendix 2)Ī Oneway between-subject’s multivariate analysis of variance (MANOVA) was conducted to assess the effects of the three treatment protocols for chronic depression. Age and gender were equally represented in all groups.
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Specifically, SSRI drug only (n = 13), Psychotherapy only (n = 13), and Drug + Psychotherapy (n = 13). Journal of Health and Social Behavior, 24, 385-396.Ī Comparison of Drug Therapy, Standard Psychotherapy, and Combined Drug + Psychotherapy for the Treatment of Chronic Depression:Ī sample of 39 chronically depressed patients were randomly assignment to one of three treatment conditions. Journal of Consulting and Clinical Psychology. “An inventory for measuring clinical anxiety: Psychometric properties”. San Antonio, TX: Psychological Corporationīeck AT, Epstein N, Brown G, Steer RA (1988). “Beck Hopelessness Scale.” The Psychological Corporation.īeck AT, Steer RA and Brown GK (1996) “Manual for the Beck Depression Inventory-II”. Model your summary after my sample summary.ĩ) Be sure to explain what conclusions can be drawn from the study.ġ0) Attach the SPSS output in an appendix to your paper.īeck A.T. Report and summarize the results for (Bonferroni’s) post hoc mean comparison tests. Be sure to report and interpret the effect sizes. Be sure to report and summarize the results from MANOVA. Fully summarize the results for the MANOVA in correct APA style. Be sure to refer to the table within the summary.Ĩ). Create an APA formatted table of the MANOVA results. Be sure to refer to the figure within the summary.ħ). Be sure to refer to the table within the summary.Ħ) Plot the means. Even if you do not meet the model assumptions, continue with the remainder of the analysis.Ĥ) Conduct the MANOVA, with follow-up Univariate ANOVAsĥ) Optional Conduct Roy-Bargmann’s Stepdown Analyses.ĥ) Within your summary include a correctly formatted (APA Style) table and figure. 778).ģ) Optional – Check for normality and outliers (Analyze>Descriptive Statistics>Explore) and for the homogeneity of the variance/covariance matrixes (Analyze>General Linear Model > Multivariate> options > homogeneity tests). Use statistical notation to state the main effects you will examine (see Warner p. Using the attached spss data file analyze the results and summarize the findings in correct APA Style:ġ) Describe the research question and the research design.Ģ) Create the Null and Alternative Hypotheses. At the end of the tenth week all participants were administered a battery of psychological tests including the Beck Depression Inventory (Beck, et al., 1988), the Beck Hopelessness Scale (Beck, 1988), the Beck Anxiety Inventory (Beck et al., 1988), and the Perceived Stress Scale (Cohen, et al., 1983). Research Problem: To assess the effectiveness of a ten-week Cognitive Behavioral Therapy (CBT) intervention as well as a ten-week CBT in combination with SSRI medications, for the treatment of Post-Traumatic Stress Disorder (PTSD), thirty Middle East War veterans diagnosed with PTSD were randomly assigned to either the CBT treatment group (n = 10), the CBT+SSRI treatment group (n = 10), or Waiting Control Group (n = 10).