Brian is a psychologist studying "the psychology of the rave party." He goes to raves in England, Scotland, Canada, and the United States, and records the behavior he observes in each location using one common set of descriptions

A paper or presentation providing extensive details about a single individual's psychiatric symptoms is known as a _______

a. Epidemiological study. b. Experiment. c. Correlational study. d. Case study.

In a correlational study, when one variable increases as a second variable decreases,

there is a _______ correlation between them. a. random c. complementary b. positive d. negative