17. Understanding the Role of Substance Expectancies in Addiction

  1. James MacKillop and
  2. Harriet de Wit
  1. Jane Metrik and
  2. Damaris J. Rohsenow

Published Online: 15 JAN 2013

DOI: 10.1002/9781118384404.ch17

The Wiley-Blackwell Handbook of Addiction Psychopharmacology

The Wiley-Blackwell Handbook of Addiction Psychopharmacology

How to Cite

Metrik, J. and Rohsenow, D. J. (2013) Understanding the Role of Substance Expectancies in Addiction, in The Wiley-Blackwell Handbook of Addiction Psychopharmacology (eds J. MacKillop and H. de Wit), Wiley-Blackwell, Oxford, UK. doi: 10.1002/9781118384404.ch17

Publication History

  1. Published Online: 15 JAN 2013
  2. Published Print: 15 FEB 2013

ISBN Information

Print ISBN: 9781119978268

Online ISBN: 9781118384404

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Keywords:

  • addiction;
  • drug use expectancies;
  • explicit expectancies;
  • implicit expectancies;
  • outcome expectancies;
  • placebo effect;
  • substance abuse

Summary

This chapter focuses on the role of substance expectancies in addiction. Drug expectancies account for differences in drug response, explain commonly observed placebo effects, and explicitly and implicitly influence proximal drinking or drug use decisions. Explicit expectancies are considered to provide a conscious guide during decision making by activating learned schemas or memories about consequences that the person believes. Implicit expectancies are believed to affect behavior outside of conscious awareness. The chapter first reviews the empirical relevance of the topic to substance abuse research and then discusses the methods for assessing implicit and explicit expectancies. With improved knowledge of the unique contribution of expectancy to treatment outcome, treatment providers can boost people's expectancies for the effect of a drug. Better understanding of the effects people explicitly expect from alcohol, tobacco, and other substances could improve future prevention methods and treatment approaches.