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