1. Dr. Moynihan conducts a study examining the relationship between the number of panic attacks a person experienced in the past month, the number of nightmares experienced in the past month, and people's levels of neuroticism (a personality trait characterized by instability, anxiety, and worry). She collects a convenience sample of 50 community college students (25 males, 25 females). Below are her findings.

(number of panic attacks in the past month and neuroticism): r = -.03, not sig.

(number of panic attacks in the past month and number of nightmares in the past month): r = -.14 (p = .05)

(number of nightmares in the past month and neuroticism): r = .48 (p = .003)

1. What type of research design is this?
2. State two questions that you might ask if you were to interrogate the construct validity of Dr. Moynihan's study.
3. Of the three findings in Dr. Moynihan's study, which finding has the largest effect size? Name two things that having a large effect size means.
4. Of the three findings in Dr. Moynihan's study, which associations are statistically significant? What does it mean that an association is statistically significant?

2. Some have claimed that children of divorced parents are not as well-adjusted as children of parents who are married. To test this idea, you set up a study with two groups. One group consists of 100 children who have divorced parents. The other group consists of 100 children who have married parents. Each child in the study is asked to complete the Social Adjustment Scale for Children (SASC). Higher scores on the scale indicate better social adjustment.

1. What type of research design is this? Discuss how you made this determination.

2. What do you think the hypothesis is?

3. Identify the variables and the operational definitions.

4. Are there any threats to internal validity? External validity?