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Step 1: Overview of the COM B Model.

The COM-B model can be used to categorise barriers into three groups. 

1. Capabilities - refer to a person's physical or psychological ability to perform the behaviour.


2. Opportunities - refer to anything in the physical or social environment that may encourage or discourage a behaviour.


3. Motivations - refer to internal reflective and automatic mechanisms that activate or inhibit a behaviour.

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Michie, S., Johnston, M., Abraham, C., Lawton, R., Parker, D., & Walker, A. (2005). Making psychological theory useful for implementing evidence based practice: a consensus approach. BMJ Quality & Safety, 14(1), 26-33.


Michie, S., Atkins, L., West, R., 2014. The Behaviour Change Wheel: A Guide To Designing Interventions. Silverback Publishing, London. 

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