One research study found that a recovered heroin abuser experienced nausea and withdrawal symptoms when he returned to the neighborhood where he had previously used heroin and experienced withdrawal effects. This research supports the idea that _____ may be a significant factor in the development and maintenance of substance addiction.

A. operant conditioning
B. participant modeling
C. classical conditioning
D. reward pathways

Ans: C. classical conditioning

Psychology

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Francois is a serious college student but changes his major frequently. Allport would

likely refer to this tendency as a(n) __________ trait. a. incidental b. primary c. cardinal d. central e. secondary

Psychology

Which of these produces the hormone estrogen?

a. the testicles b. the ovaries c. the adrenal glands d. all of the above

Psychology