The diagnosis for erectile disorder requires the problem be present for a period of about ___months or longer and that it occurs on or about _____ percent of occasions of sexual activity
a. 1; 25 c. 6; 75
b. 2; 50 d. 12; 75
C
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Opponent-process theory of color vision was proposed by
a. Hermann von Helmholtz. c. Georges Seurat. b. Thomas Young. d. Ewald Hering.
an experimental test of the effects of Vitamin B-12 on problem-solving performance, ______ is the independent variable, and ______ is the dependent variable.
a. problem-solving performance; the vitamin b. problem-solving performance; a placebo c. the vitamin; problem-solving performance d. a placebo; the vitamin
Identities that are undesirable to parents and community members are referred to by Erikson as:
A. negative identities. B. marginal identities. C. false identities. D. offensive identities.
In Erik Erikson's theory of development, each stage of life has a central crisis; in adolescence the crisis is __________.
A. integrity versus despair B. identity versus identity confusion C. trust versus mistrust D. autonomy versus shame and doubt