Which of the following designs has elements of both a within-group design and an independent-groups design?

The following scenario will be important for answering the next three questions. Dr. Gutierrez is teaching a developmental psychology class this semester. In class one day, they got to discussing a research study on the impact of nutrition on cognitive performance in elementary school students. Michael questions the study, saying, “I don’t know. How can you get an overall measure of a child’s nutrition?” Jaden also questions the study, asking, “Which schools did they include? I am curious if they included urban, suburban, and rural school students.” Claudio also is curious about the study, asking, “I wonder how strong the relationship is between nutrition and cognitive performance. Could you predict one from the other?”

How does the story of Rip Van Winkle end?

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:

Responsible journalists do which of the following as it pertains to discussing replicability?

Having an externally valid sample is more important for some research studies than others. For which of the following research questions will it be important to have an externally valid sampling technique?

In previous studies, Dr. Schulenberg has established that finding meaning in one’s everyday work activities can lead to greater success in the workplace (e.g., productivity, creativity). He is curious as to whether this can happen in the college classroom. Specifically, he is curious whether finding meaning in one’s classroom experience can lead to greater academic performance. In the spring semester, he has his teaching assistant randomly assign half the class to write a paragraph each class period about how the material has meaning for their lives (meaning group). The other half writes a paragraph about what they did to prepare for class (preparation group). He does not know which of his students are writing which paragraph, and the students are not aware they are responding to different writing assignments. To measure academic performance, he gives the students a midterm essay exam and a final exam. Imagine that in Dr. Schulenberg’s study, he notes that all of the students do extremely well on the midterm exam. When he looks at the results of the final exam, he notices that all the students’ exam scores went down. Given this information, which of the following threats might be present in his study?

Random selection enhances _________ validity and random assignment enhances _________  validity.

What is a stylistic element commonly found in Hawthorne’s writing? 

What collection of short stories brought Washington Irving international recognition?