1. Scenario: A therapist wanted to examine marital happiness in couples participating in therapy at her clinic. Couples were randomly assigned to participate in individual, couples, or group therapy. She measured marital happiness using a standardized scale ranging from 0 100, with higher numbers indicating greater marital bliss. She measured marital happiness at three time points from the start of therapy sessions (1, 6, and 12 weeks) and compared those across the three types of therapies offered. Question: What is the most appropriate statistical test to conduct given this scenario?

Randomized ANOVA

Repeated measures ANOVA

Two-way (randomized) ANOVA

Two-way Repeated Measures ANOVA

Mixed Design ANOVA

2. Scenario: What influences the likelihood of whether a person will assist a stranger? In this study, participants were shown four conditions and asked to provide the percent likelihood that they would be willing to help in each condition. The researcher wanted to see if likelihood of helping varies based on the number of bystanders (0 or 10), and/or the gender of the stranger (male or female). Each participant participated in all four conditions (0 bystanders with a female; 0 bystanders with a male; 10 bystanders with a female; 10 bystanders with a male). Question: What is the most appropriate statistical test to conduct given this scenario?

Randomized ANOVA

Repeated measures ANOVA

Two-way (randomized) ANOVA

Two-way Repeated Measures ANOVA

Mixed Design ANOVA

3. Scenario: A sports psychologist studied the effect of a motivational program on number of injuries in one year among players of three different sports (baseball, football, and basketball). Players were randomly assigned to one of two conditions: either participate in a motivational program or none (control). Data was collected on the number of injuries sustained by each athlete that season. Question: As taught in 510/515, what is the most appropriate graph if the only significant finding in this scenario is the main effect of condition ("motivational program" or "control").

Histogram

Scatterplot

Bar graph

Box plot

Line graph

4. Scenario: A sports psychologist studied the effect of a motivational program on number of injuries in one year among players of three different sports (baseball, football, and basketball). Players were randomly assigned to one of two conditions: either participate in a motivational program or none (control). Data was collected on the number of injuries sustained by each athlete that season. Question: As taught in 510/515, what is the most appropriate graph if the only significant finding in this scenario is the main effect of sport type.

Histogram

Scatterplot

Bar graph

Box plot

Line graph

5. In a study with three levels of factor A, how many degrees of freedom will this factor have?

3

4

1

2

6. In a study examining the effects of gender (male or female) and major (psychology, computer science, philosophy, or biology) on college students' willingness to perform community service work, how many main effects are possible?

3

6

5

2