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Translation and Validation of the Caffeine Expectancy Questionnaire (CaffEQ)

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Abstract

Caffeine is the most widely used psychoactive drug in the world. Expectancies for drug effects play a central role not only for drug initiation, use, cessation, and relapse, but also influence actual drug effects. In order to investigate caffeine expectancies and thereby increase knowledge and understanding of this legal drug, but also of substance use in general, an empirically sound research instrument is needed. In this study the English version of the ”Caffeine Expectancy Questionnaire (CaffEQ)” was translated and validated. The questionnaire consists of 47 items assessing expectancies of the psychological and physical effects of caffeine. The original version was translated thoroughly into German. The German CaffEQ was administered to a sample of N = 352 participants along with other relevant measures of interest. Psychometric properties could mostly be replicated. An exploratory factor analysis confirmed the seven factor solution and appropriate internal consistency was achieved. Convergent validity revealed high correlations with average daily caffeine consumption and symptoms of caffeine use disorder. By confirming validity and reliability of the German CaffEQ version a useful instrument is now available for assessment of caffeine expectancies of adults and its influence on the development of caffeine use disorder.

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Authors and Affiliations

  1. Ludwig-Maximilians-Universität München, Geschwister-Scholl-Platz 1, 80539, München, Germany

    Markus Schott

  2. Sigmund Freud PrivatUniversität Wien, Freudplatz 1, Messestraße 1, 1020 Wien, Österreich, Austria

    Wolfgang Beiglböck & Rita Neuendorff

Authors
  1. Markus Schott
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  2. Wolfgang Beiglböck
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  3. Rita Neuendorff
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Correspondence to Markus Schott.

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Author M. Schott, Author W. Beiglböck and Author R. Neuendorff declare that they have no conflict of interest.

Informed Consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all patients for being included in the study.

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Schott, M., Beiglböck, W. & Neuendorff, R. Translation and Validation of the Caffeine Expectancy Questionnaire (CaffEQ). Int J Ment Health Addiction 14, 514–525 (2016). https://doi.org/10.1007/s11469-015-9606-6

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  • DOI: https://doi.org/10.1007/s11469-015-9606-6

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