Published online by Cambridge University Press: 16 June 2009
To determine the role played by peripheral autonomic arousal in reducing avoidance behavior, 16 spider phobics were randomly assigned in a double blind fashion to either a propranolol (a drug which blocks beta-adrenergic activity) or to a placebo group. Subjects in the propranolol group performed significantly better than those given placebo although the magnitude of the effect was small. All subjects later received 90 min of participant modeling. They performed significantly better with participant modeling and there were no differences between the groups in their final performance. Implications of the data for theories of fear and avoidance behavior are discussed.
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