Table 1.

TDF domains and their explanations (reprinted with permissions from Cheung et al ⁴⁴ and Patey et al ⁴⁵)

Domain	Description
Knowledge	Existing procedural knowledge, knowledge about guidelines, knowledge about evidence and how that influences what the participants do
Skills	Competence and ability about the procedural techniques required to perform the behaviour
Social/professional role and identity	Boundaries between professional groups (ie, is the behaviour something the participant is supposed to do or someone else’s role?)
Beliefs about capabilities	Perceptions about competence and confidence in doing the behaviour and how that influences their behaviour
Optimism	Whether the participant’s optimism or pessimism about the behaviour influences what they do
Beliefs about consequences	Perceptions about outcomes, advantages and disadvantages of performing the behaviour and how that influences whether they perform the behaviour
Reinforcement	Previous experiences that have influenced whether or not the behaviour is performed
Intention	A conscious decision to perform a behaviour or a resolve to act in a certain way
Goals	Priorities, importance, commitment to a certain course of actions or behaviours
Memory, attention and decision processes	Attention control, decision-making, memory (ie, is the target behaviour problematic because people simply forget?)
Environmental context and resources	How factors related to the setting in which the behaviour is performed (eg, people, organisational, cultural, political, physical and financial factors) influence the behaviour
Social influences	External influence from people or groups to perform or not perform the behaviour How the views of colleagues, other professions, patients and families, and doing what you are told, influence the behaviour
Emotion	How feelings or affect (positive or negative) may influence the behaviour
Behavioural regulation	Ways of doing things that relate to pursuing and achieving desired goals, standards or targets Strategies the participants have in place to help them perform the behaviour Strategies the participants would like to have in place to help them