The five stages of change are precontemplation, contemplation, preparation, action, and maintenance, and they describe how people move from having no intention to change a behavior all the way through sustaining a new one. The framework comes from the Transtheoretical Model (TTM), developed by psychologists James Prochaska and Carlo DiClemente in the early 1980s, originally through studying how smokers quit. The model’s core insight is that change is not an event but a process, and that people at different points in that process need different kinds of support. Research across dozens of health behaviors has found that where someone sits along this sequence predicts how much progress they make, though the path through the stages is rarely as neat as a numbered list suggests.
What Each Stage Looks Like in Practice
In precontemplation, a person has no plan to change anytime soon. They may not see the behavior as a problem, or they may feel defeated after failed attempts and have stopped trying. From the outside this can look like denial or resistance, but it often reflects a lack of information or an overwhelming sense that change is impossible. Research on at-risk populations suggests that roughly 40% of people fall into this stage at any given time, with another 40% in contemplation and about 20% in preparation.1PubMed. The transtheoretical model of health behavior change That distribution matters because it means most people are nowhere near ready to act, and programs that assume everyone is ready tend to reach only a small fraction of their audience.
In contemplation, the person recognizes there is a problem and is seriously thinking about doing something about it, but has not committed to a specific plan. This stage can last months or even years. The hallmark is ambivalence: the person weighs the benefits of changing against the costs (effort, discomfort, giving up something enjoyable) and the two sides feel roughly equal. Contemplators are often described as “chronic contemplators” when they get stuck in this weighing process for extended periods.
In preparation, the person intends to take action soon, often within the next month, and has usually already taken small preliminary steps. A smoker in the preparation stage might have cut down the number of cigarettes per day or set a quit date. Someone preparing to exercise more might have bought running shoes or researched gym memberships. The key marker is that both intention and early behavioral evidence exist together.
In action, the person has made the overt change. They have quit smoking, started a new diet, begun attending therapy sessions, or whatever the target behavior is. The action stage is what most people think of when they think of “change,” but in the TTM framework it is just one part of a longer process. This stage typically covers the first six months of sustained new behavior.
In maintenance, the person works to prevent relapse and consolidate the gains made during action. This stage begins roughly six months after the behavior change and can last years. The person is less tempted to revert, more confident in their ability to sustain the change, and has usually developed strategies for handling high-risk situations. Some versions of the model include a sixth stage called “termination,” where the old behavior holds zero temptation and no effort is needed to maintain the new pattern, though most practical applications focus on the five stages since full termination is uncommon for many behaviors.1PubMed. The transtheoretical model of health behavior change
Why the Path Through the Stages Is Rarely Straight
The numbered list gives a misleading impression of a tidy staircase. In reality, people cycle through the stages repeatedly. Relapse is not a failure of the model; it is built into it. When someone in the action or maintenance stage slips back, they typically do not return all the way to precontemplation. Instead, they “recycle” to contemplation or preparation with more knowledge about what works and what does not. The model frames this as successive approximation learning, where each attempt teaches something that improves the next one.2PubMed Central. Relapse on the Road to Recovery: Learning the Lessons of Failure on the Way to Successful Behavior Change
This recycling view has practical consequences. If you treat a relapse as catastrophic or as evidence that a program failed, you miss what actually happened: the person learned something about their triggers, their coping skills, or their environment that they did not know before. The research suggests that “debriefing” a relapse, talking through what went wrong and what could be different next time, promotes better outcomes in subsequent attempts. Clinicians who work with this model spend as much time preparing clients for the possibility of relapse as they do supporting the initial change.
A related misconception is that everyone needs to progress through every stage in order. Some people skip preparation and jump from contemplation to action after a single jolting event, like a health scare. Others oscillate between contemplation and preparation for years without ever entering action. The stages describe common patterns, not mandatory checkpoints.
What Moves People Between Stages
Three psychological constructs help explain why people advance or get stuck. The first is decisional balance: how a person weighs the perceived benefits (pros) of changing against the perceived costs (cons). Early in the process, the cons outweigh the pros. As someone moves from precontemplation through contemplation, the pros start to gain weight. By the time a person reaches the action stage, the pros clearly dominate. Research across multiple health behaviors in workplace settings has confirmed that decisional balance scores shift reliably across the five stages, even though the specific pros and cons differ depending on the behavior.3PubMed Central. Stages of change, decisional balance, and self-efficacy across four health behaviors in a worksite environment
The second construct is self-efficacy: a person’s confidence that they can maintain the new behavior in difficult situations. Self-efficacy tends to be lowest in the early stages and highest in maintenance. Studies of university students applying the model to physical activity, for instance, found that stage of change significantly predicted self-efficacy levels.4PubMed Central. Application of Transtheoretical Model on Behavioral Changes, and Amount of Physical Activity Among University’s Students When you feel capable of handling a Friday-night craving or a rainy day that kills your motivation to go for a run, you are more likely to stay in the action or maintenance stage.
The third construct is temptation, which is essentially the inverse of self-efficacy. Temptation reflects the pull of the old behavior in challenging situations: stress, social pressure, or emotional distress. Longitudinal research on dietary fat reduction found that a person’s baseline level of temptation was significantly related to how much their readiness to change improved over time, suggesting that high temptation at the start is a genuine barrier, not just an excuse.5PubMed Central. Longitudinal analysis of intervention effects on temptations and stages of change for dietary fat using parallel process latent growth modeling
The Ten Processes That Support Change
Beyond these psychological drivers, the TTM identifies ten specific processes people use to move through the stages. These split into two groups: five experiential (cognitive and emotional) processes and five behavioral processes. Experiential processes tend to be more important in the earlier stages, while behavioral processes become more relevant during action and maintenance.6PubMed. Psychometric evaluation of the smoking cessation Processes of Change scale in an adolescent sample
The experiential processes include things like consciousness raising (learning new facts about the behavior), dramatic relief (experiencing strong emotions related to the behavior, like watching a family member struggle with a health condition), and environmental reevaluation (recognizing how your behavior affects the people around you). These processes shake loose the status quo in precontemplation and contemplation. They help you start to see the behavior differently.
The behavioral processes include counterconditioning (substituting healthier responses for unhealthy ones), stimulus control (removing cues that trigger the old behavior), and reinforcement management (rewarding yourself for progress). These become dominant in action and maintenance, when the person is actively restructuring their daily life. A practical example: someone quitting smoking might use consciousness raising in contemplation (reading about lung cancer risk), then switch to stimulus control during action (removing ashtrays from the house, avoiding smoking sections).
The important practical takeaway is that pushing behavioral strategies on someone who is still in precontemplation or contemplation usually does not work. Telling someone to “just start exercising” when they have not yet decided exercise matters to them is a mismatch. The model suggests meeting people where they are and offering the type of support that fits their current stage.
How the Model Pairs with Motivational Interviewing
Motivational interviewing (MI) is a counseling approach built around guiding people toward their own reasons for change rather than telling them what to do. It pairs naturally with the stages of change because both frameworks emphasize meeting people at their current level of readiness. MI was designed to facilitate movement through the stages, particularly for people stuck in contemplation.7PubMed. Motivational Interviewing and the Transtheoretical Model of Change: Under-Explored Resources for Suicide Intervention
Research on how nurses use MI in practice found that they intuitively applied MI skills more intensively with patients in the preparation stage than with patients in earlier stages.8PubMed. Motivational interviewing within the different stages of change: an analysis of practice nurse-patient consultations aimed at promoting a healthier lifestyle That finding is interesting because it suggests practitioners naturally pick up on readiness cues even without formal stage assessment. But it also raises a question: if the people in precontemplation are the ones who most need help moving forward, should clinicians be using MI more with them, not less?
The combination has been applied in chronic disease management, addiction treatment, and mental health settings. In chronic care specifically, social workers have found that mapping MI techniques to stage of change helps them tailor conversations with patients managing conditions like diabetes or heart disease, where long-term behavior change (diet, medication adherence, physical activity) is the central challenge.9Health & Social Work. Motivational Interviewing and Chronic Care Management Using the Transtheoretical Model of Change
Where the Evidence Gets Complicated
The stages of change model is enormously popular in health promotion, but that popularity has outpaced the evidence in some areas. The most persistent criticism is that the stages may not be truly discrete categories. Several reviewers have pointed out that the boundaries between stages are fuzzy, that people do not always move through them sequentially, and that stage assignments based on questionnaires may not reflect meaningful psychological differences.10PubMed. Stages of change. A critique A person classified as being in “contemplation” versus “preparation” might differ by a single questionnaire item, yet the model treats them as being in qualitatively different places.
The most damaging evidence concerns stage-matched interventions, the core practical promise of the model. If stages are real and meaningful, then interventions tailored to a person’s current stage should outperform generic interventions. But a Cochrane review of smoking cessation found that this was not clearly the case. In the four trials that directly compared stage-based and standard versions of the same intervention, the stage-based version was neither more nor less effective.11Cochrane Database of Systematic Reviews. Stage-based interventions for smoking cessation A separate trial with young adult smokers similarly failed to show that matching interventions to a smoker’s stage made a difference; the action-oriented intervention actually worked better across the board.12PubMed. Matched and mismatched interventions with young adult smokers: testing a stage theory
Critics in the eating disorder and weight management literature have echoed these concerns, noting problems with stage definition, measurement, and the lack of strong predictive utility.13Clinical Psychology Review. The transtheoretical model and motivational interviewing in the treatment of eating and weight disorders This does not mean the model is useless. A meta-analysis of 39 psychotherapy studies found a meaningful relationship between a client’s pretreatment stage of change and how much progress they made during therapy.14PubMed Central. Stages of change So the stages seem to describe something real about readiness, even if tailoring interventions by stage does not reliably improve results over giving everyone the best available intervention.
Where does that leave the model? Probably as a better diagnostic tool than a treatment algorithm. Knowing that a patient is in precontemplation helps a clinician understand why an action-oriented approach feels pushy and unproductive. But the clinician should not assume that only precontemplation-specific strategies are appropriate, or that a more direct approach would necessarily fail.
Does the Model Work Across Cultures?
Most of the foundational research on the TTM was conducted in the United States and Western Europe, which raises reasonable questions about whether the stages mean the same thing in different cultural contexts. Validation studies have produced mixed results. An Iranian adaptation of the TTM questionnaire for smoking cessation showed acceptable reliability and fit, suggesting the structure of the model holds together in that context.15PubMed Central. The transtheoretical model (TTM) questionnaire for smoking cessation: psychometric properties of the Iranian version
A study of Chinese Americans and physical activity told a more nuanced story. Self-efficacy scores still differed significantly between people in maintenance versus precontemplation, as the model predicts. But the expected differences in perceived benefits and barriers across stages did not show up. The researchers concluded that the model “partially applied” and that reinforcing self-efficacy mattered more for this group than emphasizing the pros and cons of exercise.16PubMed. Assessing transcultural validity of the transtheoretical model with Chinese Americans and physical activity Cultural values around family obligation, community health norms, and what counts as “exercise” may all shift how the model’s constructs play out.
The broader takeaway is that while the stage framework seems to travel reasonably well, the specific drivers that move people between stages (particularly the balance of pros and cons) may not be universal. Practitioners working with culturally diverse populations should be cautious about assuming that the same motivational levers work the same way for everyone.
How the Brain’s Reward Systems Relate to Stage Progression
More recent theoretical work has tried to connect the stages of change to what is happening in the brain’s motivation and reward circuits. An integrative review proposed that three distinct motivational systems are at play during behavior change: an approach or “wanting” system associated with pleasure, an aversion or “avoiding” system associated with relief, and an assertion or “non-wanting” system associated with a calm, habitual state.17PubMed Central. Motivation and reward mechanisms in health behavior change processes
The mapping is intuitive once you see it. In the early stages, either the appeal of the new behavior (wanting) or the desire to escape the consequences of the old one (avoiding) has to become salient enough to override inertia. During active change, learning and reinforcement support continued effort. And in maintenance, the new behavior ideally becomes habitual, sustained less by active motivation and more by the quiet reward of doing what feels normal. This neurobiological framing does not replace the TTM, but it adds a layer of explanation for why the earlier stages feel so effortful and why maintenance feels qualitatively different from action. The “muscle” required to sustain a new behavior genuinely changes over time as the brain’s reward systems shift from active wanting to settled habit.
This area of research is still young, and the proposed mappings between reward circuits and stages remain theoretical rather than experimentally confirmed. But the direction is promising because it begins to answer a question the TTM has always sidestepped: why does moving through the stages feel different at each point? The answer may lie in which neurological systems are doing the heavy lifting at any given moment.