Transtheoretical model theory

According to Prochaska and Diclemente (1983) , health behaviour changes over 6 stages.
The TTM seeks to reduce resistance towards positive health changes, facilitate progress and prevent relapse to poor behavioural choices.
6 stages:
1. Precontemplation
2. Contemplation
3. Preparation
4. Action
5. Maintenance of change
6. Temptation

1. An individual who has been unsuccessful in previous health changes, which make them unmotivated, unprepared and experience negative consequences for poor health decisions.
E.g susan has a poor and unbalanced diet, shes overweight and doesn't exercise.
2. An individual who has started to think about the positive changes towards health, usually this is 6 months before the change taking place.
3. The individual makes an intention to change their behaviour and decides what they can do to take action.
4. The changes are taking place and results are being provided
5. This stage is to prevent relapse and the changes become more defined.
6. This is the last stage where irs the end of the changes as it is the start of new health - don’t need the changes anymore or is apart of their lifestyle.

Self efficacy ;
Decisional balance ; comparing benefits and barriers that prevent the change
E.g. losing weight vs price of gym membership

Strengths:
- health behaviour can change across time and lifespan, which means it has a high internal validity.
- the TTM can identify at-risk populations
Weaknesses:
- no emphasis on where an individual could face problems than other stages like relapse.
- the TTM isn’t necessarily one, so it attempts to explain too much because there are so many modifying factors in addition to it.