Yeah, a bold title – but AI told me it was true and ok to use!
Over the years I have looked at various behaviour change models and have used them in varying degrees. Early on, if you look at my blog and books I used BJ Fogg a lot. These days it is referred to as B=MAP; Behaviour = Motivation * Ability * Prompt. It used to be B=MAT – T being trigger. I think prompt is better as it covers more ground.
More recently I have been using COM-B model for behaviour change. This was created by Susan Michie, Maartje M van Stralen, Robert West. I liked this model because there was a lot more behind it and it introduces capability and opportunity, splitting out ability into “Can you personally do it” and “Is it possible to do”. I then adds this to motivation to create a flexible model.