Reference no: EM133885499
Question
In Study 4 of Oishi et al. (2015), the authors recorded how mountainous each U.S. state is using a measure involving the highest mountain, the elevation difference, and the number of mountains it had that were reported in a list of U.S. mountains. They also used a very large-scale survey of 619,000 U.S. respondents who reported their extroversion. They computed the average level of extroversion in each state from this survey. Then they reported the association between state mountainousness and state extroversion. The correlation was reported as r = -.40 (p < .01).
a. What does the correlation mean in this result? Is this relationship strong or weak?
b. Sketch a scatterplot of this correlation on a well-labeled graph.
c. What does p < 0.01 mean in this result?
d. What might happen to this correlation if you added a forgotten state to the sample with extremely high mountains and was also extremely high in extroversion? Explain your answer, perhaps with a drawing.
e. What might happen to this correlation if you added a forgotten state to the sample with almost no mountains and that is also extremely high in extroversion? Explain your answer.
f. Imagine that Oishi et al. tried to replicate their findings. Instead of using U.S. states, they collected similar data on all of the countries of Europe. Now, think about what would happen if, in this new sample of countries, all of the countries were rated as fairly high in mountainousness-there are no countries that are low in mountainousness. What might happen to the observed correlation in this study? What phenomenon in Chapter 8 is being illustrated in this example?
g. In Study 5, the researchers measured people's extroversion levels, and then put them for a few minutes either in an open area or a wooded area. After a few minutes, they asked each person how happy they were feeling. In the wooded, secluded area, extroversion was negatively associated with happy mood. In the open, flat area, extroversion was positively associated with happy mood. What makes this a moderator? What are the three variables in this moderator relationship?
h. Write a moderator sentence of this form based on letter g above: _____ moderates the relationship between _____ and _____.