Suppose that you are participating in a study about word associations conducted by a team of researchers. You know that the study has something to do with ideas about gender, but the researchers never actually ask you to rate men and women. This study is probably testing

Which class of psychoactive drugs works by increasing activity within the nervous system?

A) Depressants B) Opiates C) Psychedelics D) Stimulants

Dr. Kang studies the development of morality in children. In her latest study she followed and assessed 3year-olds, 4-year-olds, and 5-year-olds for a period of time. The 3-year-olds were tested at ages 3, 4, and 5; the 4-year-olds at 4, 5, and 6; and the 5-year-olds at ages 5, 6, and 7. This is an example of a ___________ research design.

a. survey b. longitudinal c. cross-sectional d. sequential