Self-efficacy moderates the mediation of intentions into behavior via plans.

@article{Lippke2009SelfefficacyMT,
  title={Self-efficacy moderates the mediation of intentions into behavior via plans.},
  author={Sonia Lippke and Amelie U Wiedemann and Jochen P. Ziegelmann and Tabea Reuter and Ralf Schwarzer},
  journal={American journal of health behavior},
  year={2009},
  volume={33 5},
  pages={
          521-9
        }
}
OBJECTIVE To examine the putative moderating role of self-efficacy in the intention-planning-behavior relationship. METHODS In N=812 individuals, intentions (independent variable) were assessed at baseline, whereas action plans (mediator), self-efficacy (moderator), and physical activity (dependent variable) were measured again 4 weeks later. We examined a moderated-mediation model. RESULTS Self-efficacy moderates the mediation process: the strength of the mediated effect increased along… 
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Results reveal that intentions were partly translated into physical activity by planning, and self-efficacy moderated this mediation, reflected by a planning × self-efficiency interaction on physical activity.
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Planning is assumed to translate intentions into health behaviors. However, this may fail due to a lack of perceived self-efficacy. People do not tackle challenging tasks if they harbor self-doubts,…
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For skin-protection motivation to become effective, self-efficacy is needed in conjunction with less positive appearance norms, and for individuals who believe that they would look more attractive with a tan, self -efficacy did not have a strong effect on behavior.
Self-efficacy as a moderator of the planning–behaviour relationship in interventions designed to promote physical activity
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Results of the two studies were consistent with a moderating effect of self-efficacy in relation to the planning–behaviour relationship, and individuals with high self- efficacy benefited from planning interventions.
Self‐Efficacy and Planning Predict Dietary Behaviors in Costa Rican and South Korean Women: Two Moderated Mediation Analyses
Dietary planning is supposed to mediate between intentions and dietary behaviors. However, if a person lacks self-efficacy, this mediation might fail. A cross-sectional study in Costa Rica and a…
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Evidence is provided for the distinct role of both forms of planning in the mediation of intention into physical activity (PA) behaviour via action planning and the level of coping planning.
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TLDR
Study results demonstrated that autonomous regulation facilitated the translation of intention into behavior change via planning, which confirmed that planning mediated the intention-behavior relation with the effect of planning being moderated by autonomous regulation.
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Similar prediction patterns were found for physical activity as well as fruit and vegetable intake: changes in intention and self-efficacy predicted changes in planning, which in turn corresponded to changes in behavior.
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Findings highlight the importance of self-efficacy in predicting health behavior in motivational and volitional action phases and are expected to catalyze future research including experimental studies targeting change in individual HAPA constructs, and longitudinal research to examine change and reciprocal effects among constructs in the model.
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