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Immediate effects of a very brief planning intervention on fruit and vegetable consumption: A randomized controlled trial

Psychology , Campus Hamburg

Abstract

Action planning interventions can effectively promote fruit and vegetable (FV) consumption, but not much is known about the day-to-day translation of intervention planning into action. In this randomized controlled trial, immediate intervention effects of a very brief planning intervention on FV consumption during the following 13 days were investigated. After a 13-day pre-intervention diary, N = 206 participants (aged 19-66 years) were randomly allocated to a waiting-list control condition or a planning condition, where they formed one FV plan. Participants from both conditions completed a 13-day post-intervention diary. Self-reported daily FV consumption, FV-specific self-efficacy, and action control were assessed. Segmented linear mixed models estimating a discrete change (i.e. "jump") between diary phases showed a positive "jump" of FV intake and self-efficacy in the planning condition when compared to the control condition. For action control, such effects were not observed. Changes in study variables throughout the post-intervention phase did not differ between both conditions. Present findings extend previous evidence on action planning interventions by showing that increases in self-regulatory (i.e. self-efficacy) and behavioral (i.e. FV intake) outcomes can occur very rapidly and already on the first day for which behavioral increases were planned.

 

PMID: 33538409

DOI: 10.1111/aphw.1225

 

 

Domke A, Keller J, Heuse S, Wiedemann AU, Lorbeer N, Knoll N. Immediate effects of a very brief planning intervention on fruit and vegetable consumption: A randomized controlled trial. Appl Psychol Health Well Being. 2021 May;13(2):377-393. doi: 10.1111/aphw.12254. Epub 2021 Feb 4. PMID: 33538409.

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