Table 1.

BCTs clustered into themes

BCT themes	Number of BCTs	Potential BCTs	Acceptable and relevant BCTs
Information channel	1	Credible source1	✓
Information/content	4	Goal setting (behaviour)1	✓
		Goal setting (outcome)1	✓
		Problem solving1	✓
		Action planning1	✓
Learning	3	Demonstration of the behaviour1,2	✓
		Instruction on how to perform a behaviour1	×
		Identification of self as role model2	×
Support	3	Social support (unspecified/general)1,2	✓
		Social support (practical)1,2	✓
		Social support (emotional)2	×
Other’s approval	1	Information about others’ approval2	×
Consequences	9	Information about health consequences1	×
		Social and environmental consequences1,2	×
		Emotional consequences2	×
		Salience of consequences2	×
		Anticipated regret2	×
		Comparative imagining of future outcomes2	×
		Pros and cons2	×
		Covert sensitisation2	×
		Covert conditioning2	×
Reward	1	Social reward2	×
Change	3	Adding objects to the environment1	✓
		Prompts/cues1	✓
		Restructuring the physical environment1	×

¹ = Process 1; ² = Process 2