Aplia: Student Question X rses applia.com/af/servlet/quiz?quiz action takeQuiz&q

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Aplia: Student Question X rses applia.com/af/servlet/quiz?quiz action takeQuiz&quiz; probGuid 1010000003633bal diryxell-0016&ck; 9.1492990441567 0AAA6BSPO 5. Measuring effect ze for the repeated-measures ANOVA Alida F. Lieberman and Patricia Van Horn have created a psychotherapy model for young children who have witnessed family violence. The therapy focuses on building the parent's capacity to nurture and protect the child, thereby promoting the child's emotional health and repairing the parent-child relationship, which has been disrupted by the stress and trauma of family violence. As a clinical psychology intern, you are leaming parent-child therapy with Drs. Lieberman and Van Horn. You see six parent-dild dyads for a year and then evaluate them before therapy, after therapy, and again one year after therapy is finished. You are interested in assessing whether the treatment had an effect on the child's oppositional defiance. In the experiment above, the null hypothesis is: There are no individual differences in the oppositional defiance means Q At least one oppositional defiance mean is different from another Q There are no differences among the oppositional defiance means across the three time points The results of the study are presented in the following data table. Au scores are from the Achenbach Child Behavior checklist. Defiance Score 12-Month Participant After Before Child Treatment Treatment Follow-up Totals P 4.84 1.21 1.40 2.23 4.80 1.18 1,31 2.31 4,91 1.66 G 28.72 4.53 1.37 1.63 48.1144 P 4.62 1.20 1.25 2.17 P 5.02 1.33 1.71 1.98 T 8.16 T 12.08 T 8.48 ss 0.3718 ss 0,1190 ss 0.2200

Explanation / Answer

The null hypothesis is : There are no differences among the oppositional defiance means across three time points.

F = .7897/.0474 = 16.66

The critical value of F is 5.096.

The null hypothesis is rejected. You reasonably conclude that parent child therapy has an effect on oppositional defiance in children who have witnessed family violence.

2 = SSeffect / SStotal = 1.5794/2.29 = 0.689694

The 2 is .689694. The percentage of variance accounted for by treatment effect is 68.96 %.

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