Table 1.

Theoretical Domains Framework (TDF) of behaviour change domains and definitions [24]

COM-B		TDF domain	Definition
Capability	Psychological	Knowledge	An awareness of the existence of something.
		Skills: cognitive and interpersonal	An ability or proficiency acquired through practice.
		Memory, attention and decision processes	The ability to retain information, focus selectively on aspects of the environment and choose between two or more alternatives.
		Behavioural regulation	Anything aimed at managing or changing objectively observed or measured actions.
	Physical	Skills: physical	An ability or proficiency acquired through practice.
Opportunity	Social	Social influences	Those interpersonal processes that can cause individuals to change their thoughts, feelings or behaviours.
	Physical	Environmental context and resources	Any circumstance of a person’s situation or environment that discourages or encourages the development of skills and abilities, independence, social competence and adaptive behaviour.
Motivation	Reflective	Social/professional role and identity	A coherent set of behaviours and displayed personal qualities of an individual in a social or work setting.
		Beliefs about capabilities	Acceptance of the truth, reality or validity about an ability, talent or facility that a person can put to constructive use.
		Optimism	The confidence that things will happen for the best or that desired goals will be attained.
		Intentions	A conscious decision to perform a behaviour or a resolve to act in a certain way.
		Goals	Mental representations of outcomes or end states that an individual wants to achieve.
		Beliefs about consequences	Acceptance of the truth, reality, or validity about outcomes of a behaviour in a given situation.
	Automatic	Reinforcement	Increasing the probability of a response by arranging a dependent relationship, or contingency, between the response and a given stimulus.
		Emotion	A complex reaction pattern, involving experiential, behavioural, and physiological elements, by which the individual attempts to deal with a personally significant matter or event.