When Schaie conducted cross-sectional research comparing the cognitive abilities of adults of different ages, he found: A. a gradual decline in intellectual ability with age. B. no age-related patterns of intellectual development. C. a sudden decline in intelligence in middle adulthood. D. a gradual increase in intellectual ability with age.
When Schaie conducted cross-sectional research comparing the cognitive abilities of adults of different ages, he found:
A. a gradual decline in intellectual ability with age.
B. no age-related patterns of intellectual development.
C. a sudden decline in intelligence in middle adulthood.
D. a gradual increase in intellectual ability with age.