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Alcohol and Alcoholism Advance Access published online on October 7, 2006
Alcohol and Alcoholism, doi:10.1093/alcalc/agl082
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© The Author 2006. Published by Oxford University Press on behalf of the Medical Council on Alcohol. All rights reserved
Received February 28, 2006
Revised September 5, 2006
Accepted September 5, 2006

Article

ASSESSING MOTIVATION FOR CHANGE IN SUBJECTS WITH ALCOHOL PROBLEMS: THE MAC2-A QUESTIONNAIRE

VALTER SPILLER 1 *, VALERIA ZAVAN 2, and GIAN PAOLO GUELFI 3

1 Department of Dependence, ASL 3, Genova, Italy
2 Department of Dependence, ASL 20-22, Alessandria, Italy
3 School of Specialization in Psychiatry, University of Genova, Italy

* To whom correspondence should be addressed.
VALTER SPILLER, E-mail: spiller{at}fastwebnet.it


  Abstract

Aims: This article presents the validation study of a questionnaire (MAC2-A), created to assess motivation for change in Italian adult subjects with alcohol related problems who require or are referred for assessment and treatment. The questionnaire evaluates readiness to change (RTC), self-efficacy and discrepancy. Methods: The questionnaire was validated on 419 subjects referred to 23 health agencies in Italy. Results: The questionnaire showed good internal consistency and temporal stability. Exploratory and confirmatory factor analysis confirms the consistency with the theoretical assumptions. Test-retest showed high reliability on all scales except one. Visual analogue control scales used for reliability and concurrent validity yielded strong correlations with the corresponding variables. Conclusion: The study confirms the validity of the instrument, and its consistency with the model. The MAC2-A questionnaire is the first psychometric instrument integrating three factors (discrepancy, self-efficacy, RTC) into a 3D model of motivation for change.


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