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Predictive validity of the theory of planned behaviour: the role of questionnaire format and social desirability

โœ Scribed by Christopher J. Armitage; Mark Conner

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
116 KB
Volume
9
Category
Article
ISSN
1052-9284

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โœฆ Synopsis

The present study was designed to assess the predictive validity of a theory of planned behaviour extended to include self-identity, in the context of health-related food choice. Following criticism of the use of questionnaires in social cognitive research, the impact of questionnaire format (random vs structured) and social desirability on questionnaire responses was assessed. Findings indicated that intention was the principal determinant of food choice; attitude, subjective norm and self-identity were independently predictive of intention. There was only weak evidence to suggest eects of social desirability or questionnaire format on component relationships. The present study indicates that the impact of questionnaire format and social desirability on models such as the theory of planned behaviour is minimal, and that such models are robust predictors of food choice.

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