Review the Watch: Key Concept: Hypothesis Testing and Statistical Significance presentation in this module’s Learn section before you complete this assignment. The scenarios begin on the next page.
Research Question 1:
Is Cognitive Processing Therapy (CPT) more effective in treating PTSD than Prolonged Exposure therapy (PE)?
- Does this question represent a correlational or experimental research design? Why?
- Which of the two models you learned about in the presentation would state that there is nothing interesting going on between CPT and PE in treating PTSD?
- State the alternative hypothesis for this study.
- State the null hypothesis for this study
- Are your hypotheses directional or non-directional? How do you know this?
- Suppose you run the study, and the results come out with a p value of .23. What can you conclude about the difference between the treatments?
- In this case, would you decide to reject or fail to reject the null hypothesis? Why?
Research Question 2:
Is there a relationship between scores on the Child Behavior Checklist (CBCL) and the Eyberg Child Behavior Inventory (ECBI) in a sample of 350 fourth-grade students? - Does this question represent a correlational or experimental research design? Why?
- Which of the two models you learned about in the presentation would state that there is some kind of relationship between the scores on the CBCL and ECBI?
- State the alternative hypothesis for this study.
- State the null hypothesis for this study
- Are your hypotheses directional or non-directional? How do you know this?
- Suppose you run the study, and the results come out with a p value of .001. What can you conclude about the relationship between the scores on these two measures?
- In this case, would you decide to reject or fail to reject the null hypothesis? Why?
