The brain waves associated with the first stage of sleep are:

Cross-sectional research studies gather data from many people

who are of the same age, and compare them to others who are at a different age, and thus a different level of development. The name for a group of people who are the same age and thus were raised during the same time period is a(n) _____. A) cohort B) experimental subject group C) control group D) schema

Which method is best suited for finding out what contributes to the accomplishments of prodigies?

A) naturalistic observation B) clinical interview C) case study D) structured interview