Sol is investigating the effects of divorce on children's self-esteem. His initial sample consists of a group of 10 five-year-olds, which he plans to follow over a period of at least 15 years. When this group of children reaches age 15, Sol adds a second group of five-year-olds to his study, and plans to follow them for another 15 years. Sol's overall plan is best classified as a _____ research design.
A. correlational
B. cross-sectional
C. longitudinal
D. sequential
Answer: D
Psychology
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Sleep apnea is a disorder characterized by __________
a) difficulty falling or remaining asleep. b) nodding off without warning in the middle of the day. c) difficulty breathing while asleep. d) experiencing temporary paralysis immediately after waking up from sleep.
Psychology
Six-week-old Nigel went through periods of alertness, fussing, and crying. These periods are referred to as
a. cycles. c. states. b. rates. d. rhymes.
Psychology