Last Reviewed: 01 May 2025
Prochaska and DiClemente's (1982) transtheoretical model of behaviour change is a way of understanding an individual's readiness for making behavioural change. The model is helpful for conceptualizing the mental states of individuals at different stages of their change journey and tailoring treatment accordingly. The Stages of Change model below illustrates the stages of this model (precontemplation, contemplation, preparation, action, maintenance).

While many people will experience a relapse, it is possible for a person to sustain change at the maintenance phase. By using this model the therapist can normalise relapse. When someone relapses it is important to help them to pick up the change process at the preparation, action or maintenance phase rather than going all the way back to pre-contemplative or contemplative phase.
The person learns from each relapse every time they move through the cycle, and (hopefully) grows stronger so the relapse is shorter and less distressing.
Characteristics
No intention of changing behaviour.
Denial/lack of awareness that there is a problem: "Weight is not a concern for me"
Goals
Help the individual develop a reason for changing
Validate the individual’s experience
Encourage further self- exploration
Leave the door open for future conversations
Techniques
Validate lack of readiness
Clarify that the decision is theirs
Explain and personalize the risk
Explore potential concerns and re- evaluation of current behaviour
Encourage possibility of change
Useful Scripts
"I can understand why you feel that way"
“I know you’re an adult and you will be the one to decide if and when you’re ready to gain weight”
“I believe, based on my training and experience that this weight loss is putting you at risk for physical and psychological complications”
“Has your weight loss ever caused you a problem?”
“Everyone who’s addressed an eating issue starts where you are now, by seeing reasons why weight gain might be beneficial to your health and wellbeing.”
Characteristics
Awareness of problem
Willing to think about change
Ambivalent about change within the next month: ‘Sitting on the fence’
Goals
Validate the individual’s experience
Encourage evaluation of pros and cons of change
Encourage further self- exploration
Identify and promote new positive outcome expectations
Techniques
Validate lack of readiness
Encourage evaluation of pros and cons of change
Encourage further self-exploration
Leave the door open for future conversations
Useful Scripts
"I ‘m hearing you’re thinking about weight gain but are not ready to take action now”
“What is one benefit of gaining weight? What is one drawback of gaining weight?”
“Can you have a think about these questions at home and talk to me about it at our next visit?”
“If you feel you’d like to make some changes, we can begin some preparation work”
Characteristics
The individual has had some experience with change: ‘Testing the waters’
Planning to take action to change within the next month
Goals
Praise the decision to change behaviour
Prioritize behaviour change opportunities
Identify and assist in problem solving
Encourage small initial steps
Encourage identification of social supports
Techniques
Praise the decision to change
Prioritize behaviour change opportunities
Identify obstacles
Encourage small initial steps with a focus on building self-efficacy for change
Identify social support
Useful Scripts
"It’s great you feel good about your decision to make some changes”
“Looking at your eating habits, I think a benefit could come from switching from non- fat milk to whole milk”
“What kind of problems would you expect? How might you deal with them?”
“Which family members or friends can support you as you make this change? How can they support?”
Characteristics
Actively attempting to change behaviour
These behaviours changes may occur over a 3-6 month period
Goals
Validate all efforts at behaviour change
Focus on restructuring behavioural cues and social situations supportive of the change process
Bolster self-efficacy for dealing with obstacles
Combat feelings of loss
Techniques
Restructure cues and social support
Bolster self-efficacy for dealing with obstacles, normalise trial and error during the action phase
Reiterate long-term benefits
Acknowledge any distress relating to loss associated with change, and work collaboratively to see if there is an alternative way to meet that need in recovery
Useful Scripts
"Have you successfully altered the behaviour for 1 day to 6 months?”
Characteristics
Continued commitment to sustaining new behaviour
New behaviours replace old ones
Post 6 months to 5 years
Goals
Validate progress so far and the potential for sustained change
Plan for follow-up support Reinforce internal rewards
Discuss the potential for relapse as a normal part of the change process and make a plan to address relapse situations and feelings around relapse
Techniques
Plan follow-up support
Reinforce internal rewards
Actively discuss high risk scenarios for slips or relapses
Discuss strategies to respond to and cope with relapse
Useful Scripts
"Have you maintained change for a period of 6 months or more?”
Characteristics
Fall back into old patterns of behaviour
Goals
Validate efforts to resume ʻchangedʼ behaviour
Evaluate trigger for relapse – treat the relapse as a learning experience
Reassess motivation and barriers to sustained change
Identify additional coping strategies/support which may be required
Techniques
Evaluate triggers for relapse
Reassess motivation and barriers
Plan effective coping strategies
References
Prochaska, J. O., & DiClemente, C. C. (1982). Transtheoretical therapy: Toward a more integrative model of change. Psychotherapy: Theory, Research & Practice, 19(3), 276–288.
Adapted: UCLA Centre for Human Nutrition: http://www.cellinteractive.com/ucla/physcian_ed/
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