Research has shown that:
A) fluctuations in the hormone levels of adolescents lead to marked mood swings.
B) adolescent boys' mood swings are more noticeable than are the mood swings of adolescent girls.
C) adolescents are no moodier than are children.
D) the "storm and stress" of adolescence is more common today than it was 200 years ago.
C) adolescents are no moodier than are children.
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Which statement concerning cognitive development in adolescence is true?
a. Working memory and processing speed are more childlike than adultlike. b. Working memory becomes adultlike, but processing speed remains childlike. c. Processing speed becomes adultlike, but working memory remains childlike. d. Working memory and processing speed are more adultlike than childlike.
By what age will a child demonstrate tertiary circular reactions?
a. by 2-3 months c. by 8-9 months b. by 4-5 months d. not until 12-18 months
When the controls of an experiment are lax and the experimenter's conclusion that the independent variable had an effect is not justified, the study lacks _____
a. causal certainty c. a null hypothesis b. internal validity d. external validity
How long must anxiety and worry last before someone can be diagnosed as having generalized anxiety disorder?
a) 1 week b) 1 month c) 6 months d) 1 year