Gary likes to spread butter on crackers and eat them as a snack. When Jackie sees the butter her stomach becomes upset. Before long, the sight of Gary causes her stomach to become upset. Gary likes Jackie so he stops eating crackers with butter and Jackie agrees to start seeing him again. One day for no apparent reason, when Jackie sees Gary her stomach gets very upset. The latest stomach upset can be explained by:

A. acquisition and persistence

B. extinction and spontaneous recovery

C. generalization

D. variable ratio reward

B. extinction and spontaneous recovery

Psychology

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Membership in a _____ is based on reputation, observable behavior, and stereotypes

A) status hierarchy B) clique C) crowd D) reference group

Psychology

The characteristics of an individual's genetic material are referred to as his or her _____

a. phenotype b. genotype c. inheritance d. environment

Psychology