Saturated fat consumption and the Theory of Planned Behaviour: Exploring additive and interactive effects of habit strength

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• 作者：Gert-Jan de Bruijn ; Willemieke Kroeze ; Anke Oenema ; Johannes Brug
• 关键词：Fat intake ; Habit strength ; Theory of Planned Behaviour ; Interaction
• 刊名：Appetite (APPET)
• 出版年：2008
• 期刊代码：109_01956663
• 类别：abs
• 出版时间：September 2008
• 卷：51
• 期：2
• 页码：318-323
• 文件大小：191 K

摘要

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 (β = −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 (β = 0.11), simple slope analyses revealed that intention was a significant correlate of fat intake for low levels (β = −0.29) and medium levels (β = −0.19) of habit strength, but a weaker and non-significant correlate for high levels (β = −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.