Fruit and Vegetable Intake: the Interplay of Planning, Social Support, and Sex

Daniela Lange , Jana Corbett , Nina Knoll , Ralf Schwarzer , Sonia Lippke


Purpose Intention and planning are important predictors of dietary change. However, little attention has been given yet to the relationship between them as a function of other social-cognitive factors and their interplay with socio-demographics such as sex. Methods In an observational study (1520 women, 430 men) with two measurement points in time, intention (predictor), planning (mediator), social support (first moderator), and sex (second moderator) were assessed to predict changes in diet separately for fruit and vegetable intake. Results All predictors had a main effect on fruit intake but no interactions emerged. For vegetable intake, the mediation-chain was qualified by a three-way interaction: for women, the lower the perceived social support, the more the translation of planning into behavior; for men, the higher the perceived social support, the more the translation of planning into behavior. Conclusions Even though intention and planning are predictors of dietary change, they operate differently under specific conditions (level of social support), for specific subgroups (men vs. women), and for different target behaviors (fruit vs. vegetable intake). These results suggest to further examine the mechanisms by which intentions are translated into behavior via planning.
Author Daniela Lange
Daniela Lange,,
, Jana Corbett
Jana Corbett,,
, Nina Knoll
Nina Knoll,,
, Ralf Schwarzer (Filia we Wrocławiu / II Wydział Psychologii we Wrocławiu)
Ralf Schwarzer,,
- II Wydział Psychologii we Wrocławiu
, Sonia Lippke
Sonia Lippke,,
Journal seriesInternational Journal of Behavioral Medicine, ISSN 1070-5503, (A 30 pkt)
Issue year2018
Publication size in sheets0.5
Keywords in EnglishFruit and vegetable intake ; Intention ; Planning ; Social support ; Sex differences
ASJC Classification3202 Applied Psychology
Languageen angielski
Friut and Vegetable Intake_tekst online.pdf 857.97 KB
Additional file
Oświadczenie_publ_Schwarzer_DIGsigned.pdf 275.57 KB
Score (nominal)30
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.971; WoS Impact Factor: 2017 = 2.012 (2) - 2017=2.259 (5)
Citation count*6 (2021-01-15)
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