Stages of behavior change. Transtheoretical Model of Change, a theoretical model of behavior change was originally explained by Prochaska & DiClemente, 1983. The TTM is a model of intentional change. This model focuses on the decision making of the individual. source: http://currentnursing.com/nursing_theory/transtheoretical_model.html
Understanding why people behave the way they do, and designing interventions and communications to elicit new, more positive behaviours is an established discipline – but using social media as part of the mix is relatively new.