Research article summary (published 30 Aug 2009):

Caffeine expectancy: instrument development in the Rasch measurement framework.

Full Abstract

Although caffeine is the most widely consumed psychoactive drug in the world, the mechanisms associated with consumption are not well understood. Nonetheless, outcome expectancies for caffeine use are thought to underlie caffeine's reinforcing properties. To date, however, there is no available, sufficient measure by which to assess caffeine expectancy. Therefore, the current study sought to develop such a measure employing Rasch measurement models. Unlike traditional measurement development techniques, Rasch analyses afford dynamic and interactive control of the analysis process and generate helpful information to guide instrument construction. A 5-stage developmental process is described, ultimately yielding a 37-item Caffeine Expectancy Questionnaire (CEQ) comprised of 4 factors representing "withdrawal symptoms," "positive effects," "acute negative effects," and "mood effects." Initial evaluation of the CEQ yielded sufficient evidence for various aspects of validity. Although additional research with more heterogeneous samples is required to further assess the measure's reliability and validity, the CEQ demonstrates potential with regard to its utility in experimental laboratory research and clinical application. 2009 APA, all rights reserved.

Author information

Author/s: Heinz, Adrienne J (AJ); Kassel, Jon D (JD); Smith, Everett V (EV);

Affiliation: Department of Psychology, University of Illinois at Chicago, Chicago, IL. aheinz3(-atsign-)uic.edu

Journal and publication information

Publication Type: Journal Article

Journal: Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors (Psychol Addict Behav), published in United States. (Language: eng)

Reference: 2009-Sep; vol 23 (issue 3) : pp 500-11

Dates: Created 2009/09/22; Completed 2009/10/27;

PMID: 19769434, status: MEDLINE (last retrieval date: 10/27/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adolescent Adult Affect - drug effects Arousal - drug effects Caffeine - adverse effects; pharmacology Central Nervous System Stimulants - adverse effects; pharmacology Culture Female Humans

Male Pilot Projects Psychometrics - statistics & numerical data Questionnaires Reproducibility of Results Set (Psychology) Substance Withdrawal Syndrome - diagnosis; psychology Substance-Related Disorders - diagnosis; psychology Young Adult

Associated Chemicals: Central Nervous System Stimulants (0) ; Caffeine (58-08-2)

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