Validation of factor structures of the Drinking Motives Questionnaire among the Czech young and adult general population.

Nevertheless, the comparison of the four-factor model with the more parsimonious three-factor structure yields similar results: a substantial χ 2 difference value of ~ 200 with only df = 3 restricted degrees of freedom, thus favouring the four-factor model in a highly significant way ( p < 0.001).

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