Figure 2
The figure shows three concentric circles, with each circle being color-coded. A legend shows the following color code: green for “Sources of behaviour,” red for “Intervention functions,” and grey for “Policy categories.” The innermost circle represents the “Sources of behaviour” and comprises three sectors labeled “Capability,” at top left, “Opportunity,” at the top right, and “Motivation,” at the bottom. Each sector is divided into two sub-sectors, representing subcategories. Under “Capability,” the subcategories are “Psychological” and “Physical.” Under “Opportunity,” the subcategories are “Social” and “Physical.” Under “Motivation,” the subcategories are “Reflective” and “Automatic.” The middle circle represents the “Intervention functions” and is divided into 9 sections. From the top in a clockwise manner, these sections are labeled as follows: “Education,” “Persuasion,” “Incentivisation,” “Coercion,” “Training,” “Enablement,” “Modelling,” “Environmental restructuring,” and “Restrictions.” The outer circle represents “Policy categories” and is divided into 7 sections. From the top in a clockwise manner, these sections are labeled as follows: “Environmental or Social planning,” “Communication or Marketing,” “Legislation,” “Service provision,” “Regulation,” “Fiscal measures,” and “Guidelines.” “Opportunity” in the innermost circle covers “Education,” “Persuasion,” “Incentivisation,” and “Coercion” intervention functions. Further, it covers “Environmental or Social planning,” “Communication or Marketing,” and “Legislation” policy categories. “Motivation,” in the innermost circle covers “Coercion,” “Training,” and “Enablement” intervention functions. Further, it covers “Legislation,” “Service provision,” and “Regulation,” policy categories. “Capability” in the innermost circle covers “Modelling,” “Environmental restructuring,” “Restrictions,” and “Education” intervention functions. Further, it also covers “Regulation,” “Fiscal measures,” and “Guidelines” policy categories.The Behaviour Change Wheel (Michie et al., 2011)