Table 3.

TDF Domains Mapped to COM-B

COM-B SYSTEM	TDF DOMAIN	INTERVENTION FUNCTIONb
Capability: Psychological	1. Knowledge 2. Memory, Attention and Decision Process 3. Behavioral Regulation	Education: Increasing knowledge or understanding Training: Imparting skills Enablement: Increasing means/reducing barriers to increase capability or opportunity
Capability: Physical	4. Skillsa	Training Enablement
Opportunity: Social	5. Social Influences	Restriction: Using rules to increase the target behaviour by reducing the opportunity to engage in competing behaviours Environmental Restructuring: Changing the physical or social context Enablement: Increasing means/reducing barriers to increase capability or opportunity
Opportunity: Physical	6. Environmental context and resources	Restriction Environmental restructuring Enablement
Motivation: Automatic	7. Emotion	Persuasion: Using communication to induce positive or negative feelings or stimulate action Incentivisation: Creating expectation of reward Coercion: Creating expectation of punishment or cost Modeling: Providing an example for people to aspire to or imitate Enablement: Increasing means/reducing barriers to increase capability or opportunity Environmental Restructuring
Motivation: Reflective	8. Professional role and identity 9. Beliefs about capabilities 10. Goalsa 11. Intentionsa 12. Beliefs about consequences	Education Persuasion Incentivisation Coercion
Other (not transposed on TDF)	13. Reinforcement 14. Optimism

^aTDF domain uniquely identified as a facilitator to MCC discussion and decision-making

^bDefinitions taken from Michie M, van Stralen M, West R. The behaviour change wheel: A new method for characterising and designing behaviour change interventions. Implementation Science, 2011; 6:42