Short answer. You are conducting a study on an effective therapy for borderline personality disorder (BPD). Your subjects are randomly assigned to one of three types of therapy: 20 sessions of CBT, 20 sessions of DBT, and 20 sessions of psychoanalysis. Participants are given the Diagnostic Interview for Borderlines-Revised (DIB-R) before and after the 20 therapy sessions, to assess treatment efficacy.  Based on the literature around BPD, you hypothesize that the DBT group will see the greatest improvement in DIB-R scores. 1) What measure of central tendency should you use to assess the dependent variable? And what is a potential confounding variable in this case? 2) What is your null hypothesis? What is your alternative hypothesis? 3) Is it directional or non-directional? and what statistical test would you use to assess your data? Please Answer Questions Completely Do Not Leave Questions Unsolved

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You are conducting a study on an effective therapy for borderline personality disorder (BPD). Your subjects are randomly assigned to one of three types of therapy: 20 sessions of CBT, 20 sessions of DBT, and 20 sessions of psychoanalysis. Participants are given the Diagnostic Interview for Borderlines-Revised (DIB-R) before and after the 20 therapy sessions, to assess treatment efficacy.  Based on the literature around BPD, you hypothesize that the DBT group will see the greatest improvement in DIB-R scores.

1) What measure of central tendency should you use to assess the dependent variable? And what is a potential confounding variable in this case?

2) What is your null hypothesis? What is your alternative hypothesis?

3) Is it directional or non-directional? and what statistical test would you use to assess your data?

Please Answer Questions Completely Do Not Leave Questions Unsolved

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