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Combining self-affirmation with the extended parallel process model: the consequences for motivation to eat more fruit and vegetables.
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posted on 2023-06-08, 21:56 authored by Lucy E Napper, Pete HarrisPete Harris, William M P KleinThere is potential for fruitful integration of research using the Extended Parallel Process Model (EPPM) with research using Self-affirmation Theory. However, to date no studies have attempted to do this. This article reports an experiment that tests whether (a) the effects of a self-affirmation manipulation add to those of EPPM variables in predicting intentions to improve a health behavior and (b) self-affirmation moderates the relationship between EPPM variables and intentions. Participants (N = 80) were randomized to either a self-affirmation or control condition prior to receiving personally relevant health information about the risks of not eating at least five portions of fruit and vegetables per day. A hierarchical regression model revealed that efficacy, threat × efficacy, self-affirmation, and self-affirmation × efficacy all uniquely contributed to the prediction of intentions to eat at least five portions per day. Self-affirmed participants and those with higher efficacy reported greater motivation to change. Threat predicted intentions at low levels of efficacy, but not at high levels. Efficacy had a stronger relationship with intentions in the nonaffirmed condition than in the self-affirmed condition. The findings indicate that self-affirmation processes can moderate the impact of variables in the EPPM and also add to the variance explained. We argue that there is potential for integration of the two traditions of research, to the benefit of both.
History
Publication status
- Published
File Version
- Published version
Journal
Health CommunicationISSN
1041-0236Publisher
Taylor & FrancisExternal DOI
Issue
6Volume
29Page range
610-8Department affiliated with
- Psychology Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2015-07-30First Compliant Deposit (FCD) Date
2015-07-30Usage metrics
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