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Monday, March 19, 2012

The association between drinking motives and alcohol-related consequences – room for biases and measurement issues?

To investigate whether the predominant finding of generalized positive associations between self-rated motives for drinking alcohol and negative consequences of drinking alcohol are influenced by a) using raw scores of motives that may weight inter-individual response behaviours too strongly, and b) predictor-criterion contamination by using consequence items where respondents attribute alcohol use as the cause.

Cross-sectional study within the European School Survey Project on Alcohol and other Drugs (ESPAD)

School classes

Students, ages 13 to 16 (n= 5633)

Raw, rank, and mean-variance standardized scores of the Drinking Motives Questionnaire-Revised (DMQ-R); four consequences: serious problems with friends, sexual intercourse regretted the next day, physical fights, and troubles with the police, each itemized with attribution ("because of your alcohol use") and without.

As previously found in the literature, raw scores for all drinking motives had positive associations with negative consequences of drinking, while transformed (rank or z) scores showed a more specific pattern: external reinforcing motives (social, conformity) had negative, and internal reinforcing motives (enhancement, coping) had non-significant or positive associations with negative consequences. Attributed consequences showed stronger associations with motives than non-attributed ones.

Standard scoring of the Drinking Motives Questionnaire (Revised) fails to capture motives in a way that permits specific associations with different negative consequences to be identified whereas use of rank or z scores does permit this. Use of attributed consequences overestimates the association with drinking motives.

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