Using MRI techniques, researchers have observed that, when they are exposed to pictures of strangers, shy people exhibit
a. less activity in the amygdale than those who are bold.
b. greater activity in the hippocampus than those who are bold.
c. greater activity in the amygdale than those who are bold.
d. less activity in the hippocampus than those who are bold.
Question 2
Camryn uses a survey to measure the association between students' grade point average and weekly consumption of alcohol. She finds that higher GPAs tend to be associated with lower levels of alcohol consumption (and vice versa). This study is best described as a(n)
a. experiment.
b. observational study.
c. concurrent study.
d. correlational study.