title: Saturated fat consumption and the Theory of Planned Behaviour: exploring additive and interactive effects of habit strength.
abstract: The additive and interactive effects of habit strength in the explanation of saturated fat intake were explored within the framework of the Theory of Planned Behaviour (TPB). Cross-sectional data were gathered in a Dutch adult sample (n=764) using self-administered questionnaires and analyzed using hierarchical regression analyses and simple slope analyses. Results showed that habit strength was a significant correlate of fat intake (beta=-0.11) and significantly increased the amount of explained variance in fat intake (R(2-change)=0.01). Furthermore, based on a significant interaction effect (beta=0.11), simple slope analyses revealed that intention was a significant correlate of fat intake for low levels (beta=-0.29) and medium levels (beta=-0.19) of habit strength, but a weaker and non-significant correlate for high levels (beta=-0.07) of habit strength. Higher habit strength may thus make limiting fat intake a non-intentional behaviour. Implications for information and motivation-based interventions are discussed.
authors.affiliation: Department of Communication Science, Amsterdam School of Communications Research ASCoR, Kloveniersburgwal 48, 1012 CX Amsterdam, The Netherlands. g.j.debruijn@uva.nl <g.j.debruijn@uva.nl>
authors.forename: Gert-Jan
authors.initials: GJ
authors.lastname: de Bruijn
authors.forename: Willemieke
authors.initials: W
authors.lastname: Kroeze
authors.forename: Anke
authors.initials: A
authors.lastname: Oenema
authors.forename: Johannes
authors.initials: J
authors.lastname: Brug
mesh_terms: D000328:Adult; D001294:Attitude to Health; D003430:Cross-Sectional Studies; D004034:Diet Surveys; D004041:Dietary Fats / Q000008:administration & dosage*; D005247:Feeding Behavior; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D009042:Motivation; D009426:Netherlands; D009747:Nutritional Physiological Phenomena; D010353:Patient Education as Topic; D011237:Predictive Value of Tests; D012044:Regression Analysis; D011795:Surveys and Questionnaires
chemical_list: D004041:Dietary Fats