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Table 2 Social Cognitive Theory construct mapping for the SHED-IT interventions

From: The SHED-IT community trial study protocol: a randomised controlled trial of weight loss programs for overweight and obese men

Intervention component Group allocation SCT construct Behaviour change techniques
    * Provide information about behaviour-health link
   * Observational learning * Use of identifiable role model to model positive behaviours
WL DVD Resources/Online * Outcome expectations * Verbal persuasion from credible information source
   * Behavioural capability * Prompt self-monitoring of behaviours
   * Self-efficacy * Prompt specific goal setting
    * Information on consequences
   * Behavioural capability * Provide information about behaviour-health link
   * Outcome expectations * Facilitate mastery by encouraging gradual behaviour change
WL Handbook Resources/Online * Perceived barriers * Prompt self-monitoring of behaviours
   * Goal setting & intention * Prompt specific goal setting (implementation intention)
   * Self-efficacy * Barrier identification
WL Support Book Resources/Online * Self-monitoring * Goal setting * Goal setting * Social support * Intentions * Self-efficacy * Prompt specific goal setting * Prompt self-monitoring and recording of behaviours (weight chart, waist chart, step count chart, healthy lifestyle diary) * Identification of social support strategies & encourage WL strategies that involve the support of others * Identification of social support strategies & encourage WL strategies that involve the support of others
Self-monitoring items (kJ counter book, pedometer, tape measure)   * Self-monitoring * Facilitate self-monitoring of behaviours
  Resources/Online * Goal setting * Prompt specific goal setting (implementation intention)
   * Self-monitoring * Prompt self-monitoring of behaviour
Access to study website & website user guide Online only * Behavioural capability * Prompt goal setting
   * Goal setting * Increase knowledge and skills relating to key WL behaviours
   * Self-efficacy * Detailed instruction of essential website features
   * Social support * Provide information about behaviour-health link
   * Behavioural capability * Provide social support and general encouragement
7 individualised feedback sheets Online only * Outcome expectations * Prompt self-monitoring
   * Self-efficacy * Prompt review of goals & social support strategies
  1. Abbreviations: WL = weight loss; SCT = Social Cognitive Theory; kJ = kilojoule