See the Fletcher scenario above for this question: In addition to measuring the group of participants who joined a fraternity/sorority, Dr. Fletcher decides to give the same measure to another group of 55 participants who decided to not join a fraternity/sorority. After conducting the study, Dr. Fletcher finds out that the people who joined a fraternity/sorority all saw a documentary on body image sponsored by the InterGreek Council the night before recruitment began. This threat to internal validity is known as a:

What does Goodman Brown lose in the forest? 

Dr. Whetstone is curious about how self-esteem changes as a result of a new counseling program. She is concerned about testing threats in her study. Which of the following would you recommend to her as a way to address this type of threat?

Edgar Allan Poe was born in which city? 

What symbol does Faith wear that represents her purity? 

Dr. Abioye is a medical doctor who is interested in studying children with a rare neurological disease. She finds several people in an online parent’s support group to participate in her study. She also asks them if they can provide the names and contact information of other people who have children with the same condition. She continues to ask new participants if they know anyone else with the condition. This is an example of what kind of sampling?

Dr. Huang is concerned that the participants will behave differently because of the presence of research assistants. He is concerned about:

What is the narrator mourning in “The Raven”? 

Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings.•  Life satisfaction and experience of daily stress: r = −.57 (p = .01)•  Number of friends one has and experience of daily stress: r = .09, not sig.•  Number of friends one has and life satisfaction: r = .36 (p = .04) Comparing all three correlations, Dr. Guidry will be most able to accurately predict life satisfaction from the experience of daily stress because the relationship:

Poe’s writing style is characterized by: