A characteristic that first shows up in the formal operational stage is:
a) irreversibility.
b) egocentrism.
c) abstract thinking.
d) logical thinking.
ANS: C
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Research has found that low serotonin levels may be implicated in suicidal behavior because they affect all of the following EXCEPT a. impulsivity
b. instability. c. inertia. d. overreactivity.
Sexuality becomes a central aspect of adolescents' lives partly because
A) reductions in androgens and estrogens associated with puberty. B) children do not think about sex until adolescence. C) the growing cognitive maturity of adolescents allows them to think about sex in a more abstract and hypothetical way. D) of the influence of the media.
The variable that the researcher changes or varies to see if it has an effect is called the
a. interjudge reliability. b. independent variable. c. dependent variable. d. correlation coefficient.
According to Freud, a woman's pleasure from nursing her baby is reflected in which part of the personality?
A. ego ideal B. id C. superego D. ego