title: The Role of Social Support and Self-efficacy for Planning Fruit and Vegetable Intake.
abstract: The aim of the current study was to examine the joint effect of self-efficacy, action planning, and received social support on fruit and vegetable intake.
  
  
  
  The study used a longitudinal design with 3 waves of data collection.
  
  
  
  Major university campus in Beijing, China.
  
  
  
  Young adults (n = 286).
  
  
  
  Age, gender, body mass index, dietary self-efficacy, and baseline behavior were measured at time 1. Two weeks after time 1, received social support and action planning were assessed (time 2); 4 weeks after time 1, subsequent fruit and vegetable consumption was measured (time 3).
  
  
  
  In a path analysis, action planning at time 2 was specified as a mediator between self-efficacy at time 1 and fruit and vegetable intake at time 3, controlling for age, gender, body mass index, and baseline behavior. In addition, in a conditional process analysis, received social support at time 2 was specified as a moderator of the self-efficacy-planning relationship.
  
  
  
  Action planning mediated between self-efficacy and subsequent dietary behavior, and received social support moderated between self-efficacy and planning supporting a compensation effect. Action planning served as a proximal predictor of fruit and vegetable intake, and planning one's consumption was facilitated by dietary self-efficacy.
  
  
  
  Through the identification of social cognitive factors influencing dietary planning, interventions can target self-efficacy and received social support to test the efficacy of these mechanisms in increasing individuals' ability to ensure they consume adequate amounts of fruits and vegetables.
authors: Department of Health Promotion, Education, and Behavior & South Carolina SmartState Center for Healthcare Quality (CHQ), Arnold School of Public Health, University of South Carolina, Columbia, SC.
authors: Guangyu
authors: G
authors: Zhou
authors: School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Department of Psychology, Peking University, Beijing, China. Electronic address: ygan@pku.edu.cn.
authors: Yiqun
authors: Y
authors: Gan
authors: School of Applied Psychology, Griffith University, Brisbane, Queensland, Australia; School of Psychology and Speech Pathology, Curtin University, Perth, Western Australia, Australia.
authors: Kyra
authors: K
authors: Hamilton
authors: Department of Psychology, Free University of Berlin, Berlin, Germany; Department of Clinical, Health, and Rehabilitation Psychology, University of Social Sciences and Humanities, Warsaw, Poland.
authors: Ralf
authors: R
authors: Schwarzer
mesh_terms: D000293:Adolescent; D000328:Adult; D004032:Diet / Q000523:psychology*; D005260:Female; D005638:Fruit; D015438:Health Behavior; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D020377:Self Efficacy; D012944:Social Support; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data; D014675:Vegetables; D055815:Young Adult
keywords: action planning; dietary self-efficacy; fruit and vegetable intake; received social support