In a sequential design,
A) participants are presented with a novel task, and researchers follow their mastery over a series of closely spaced sessions.
B) groups of people differing in age are studied at the same point in time.
C) researchers conduct several cross-sectional or longitudinal investigations.
D) participants are studied repeatedly at different ages, and changes are noted as they get older.
C
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The serious addiction that often accompanies stimulant use
a. is a urban myth. b. is time-limited and will fade on its own over a short period of time. c. is not related to the actions of neurotransmitters in the brain. d. may be related to long-term changes in the brain's neurotransmitter systems.
In the United States, gender differences in self-esteem are most pronounced among ________
a) White lower class people b) White upper class people c) non-White middle class people d) non-White lower class people