Lydia, a 14-month-old baby, likes to play with small pots and pans as they make noise. She enjoys the sound but often gets bored after a short time. She then beats different containers to make different types of sound. In the context of Piaget's cognitive-stage theory, Lydia's action is an example of
A. mental combinations.
B. tertiary circular reactions.
C. secondary circular reactions.
D. primary circular reactions.
Answer: B
Psychology
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In cross-sectional studies, the same people are measured repeatedly over time, and changes in development, such as gains in height or changes in mental abilities, are recorded.
a. true b. false
Psychology
By the end of the eighth week the embryo ____
a. is unrecognizable as human b. responds to touch and can move c. has yet to develop major organs d. has fully developed sex organs
Psychology