In the cross-sectional design,
A) groups of people differing in age are studied at the same point in time.
B) participants are studied repeatedly at different ages, and changes are noted as they get older.
C) participants are presented with a novel task, and researchers follow their mastery over a series of closely spaced sessions.
D) the investigator conducts several sequences and makes cross-sectional comparisons.
A
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In most boys, the first outward sign of puberty is
A) the appearance of facial hair. B) the growth of the testes and scrotum. C) the appearance of pubic hair. D) register changes in the voice.
From a global perspective, which of the following best describes the living arrangements for most individuals who are in late adulthood and their children?
a. parents and children live in separate households once children reach adulthood b. parents and children live in different towns or cities c. parents and children live in different homes but in the same town d. parents and children continue to live in the same household