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Table 1 Interview/focus group questions asked to participants in accordance with the TDF and COM-B model

From: Comparison of barriers and facilitators of MIND diet uptake among adults from Northern Ireland and Italy

COM-B TDF QUESTION
Psychological Capability Knowledge. What is your understanding of the MIND diet?
Psychological Capability Memory, attention and decision processes. To what extent is eating MIND diet foods something you normally do?
➢ Prompt: Do you eat MIND diet foods each day
Psychological Capability Behaviour regulation To what extent do you monitor whether you are eating MIND die foods?
Physical
Capability
Skills To what extent are you confident in cooking/eating MIND diet foods?
Social Opportunity Social influences To what extent do/would your family or friends help or hinder you eating MIND diet foods?
➢ Prompt: Does/would your family support you in eating the MIND diet?
Physical Opportunity Environmental context and resources. Discuss anything in your work or/and home environment that might help or hinder you eating the MIND diet? E.g budget, time
Reflective Motivation Social/Professional role and identity To what extent would eating the MIND diet be accepted by your friends and family?
➢ Prompt: Do you think your family/friends influences what you eat?
Reflective Motivation Belief about capabilities How difficult/easy would it be for you to eat the MIND diet?
➢ Prompt: What are the barriers to consuming the MIND diet?
➢ Prompt: What are the facilitators to consuming the MIND diet?
Reflective Motivation Optimism To what extent are you confident that any barriers you may have to eating the MIND diet can be solved?
Reflective Motivation Intention To what extent do you intend to follow the MIND diet to promote brain health?
Reflective Motivation Goals To what extent would you like to follow the MIND diet?
Reflective Motivation Belief about consequences What do you think will happen if you eat the MIND diet?
➢ Prompt: Discuss any benefits to eating the MIND diet?
Automatic Motivation Reinforcement To what extent are there any incentives for you to the MIND diet?
Automatic
Motivation
Emotion How do you feel about eating the MIND diet?
  1. COM-B Capability (C): Psychological or physical ability to enact behaviour, Opportunity (O) Physical and social environment that enables behaviour, Motivation (M) Reflective or automatic mechanisms that activate or inhibit behaviour, Behaviour (B), TDF Theoretical Domains Framework [45].