Can personality change in adulthood?
Personality traits can change over time. Learn what research shows, how group averages differ from individuals, and how to interpret a new test result.
By Charles · Published · Updated
Yes. Research tracking personality traits over time finds both stability and change across adulthood, although an average pattern does not predict what will happen to any one person. A different personality test label is a separate observation and does not, on its own, prove that an underlying trait has changed.
To reflect on a result without treating it as a verdict, read how to use personality test results. If two labels differ, our guide to why personality test results change explores that question separately.
Key facts
- A 2022 meta-analysis of longitudinal studies found evidence for both personality-trait stability and change across the lifespan. It combined research on traits, not PersonalityPro type codes.
- The same analysis examined both changes in group averages and the stability of people's relative positions within groups. These are different questions, and neither gives a personal forecast.
- An American Psychological Association report describes a 2003 study comparing Big Five scores across adult age groups. Its sample was volunteers in the US and Canada; age-group differences do not by themselves show how a particular person's scores changed over time.
- Sources checked 14 November 2026. The findings do not validate PersonalityPro or establish what caused a change in any individual.
What does it mean for a personality trait to change?
A trait describes a tendency across situations, while a single action describes what happened on one occasion. Someone who speaks up in one meeting, for example, has shown behaviour in that setting; the event alone does not establish a lasting change in how outgoing they tend to be.
Researchers can measure traits repeatedly and compare responses over time. The 2022 longitudinal meta-analysis combined studies that tracked traits using a range of measures related to personality models. It found evidence for stability alongside changes in average trait levels. Its findings concern the measures and populations in those studies, not a particular person's test result.
Personality is not a promise that someone will behave identically in every situation. It is also not necessary to decide that a whole identity has changed because a particular habit, role or preference feels different.
How can traits be stable and still change?
Stability and change can refer to different comparisons. Imagine a group whose average score on a trait rises over several years. People could still keep much the same ordering relative to each other, even though the group's average moved. Conversely, individuals' relative positions could shift even if the group average stayed similar.
| Research question | What it describes | What it cannot tell you alone |
|---|---|---|
| Did the group average change? | The average level in the people studied at different times. | Whether you changed, or by how much. |
| Did relative positions stay similar? | Whether people who scored higher or lower relative to others tended to retain that position. | Whether nobody's own score changed. |
| Did a person's scores differ? | A difference in that person's measured responses at the two assessments. | Whether the difference reflects lasting trait change or its cause. |
The 2022 review reports both kinds of group evidence. Its authors found rank-order stability increased through early life and reached a plateau in young adulthood, alongside average-level changes. Those results should not be turned into a timetable that every individual must follow.
Does personality stop changing at a certain age?
The evidence does not support a simple deadline after which change becomes impossible. The 2022 longitudinal review describes stability and change throughout the lifespan. Some patterns in its analysis differed by trait and measure; a group finding about a particular age does not tell you what your own path should look like.
The APA's 2003 report discusses differences in Big Five scores across adults of different ages in an online volunteer sample. That comparison is useful context, but it is not the same as following every participant for decades. The report's sample and method also limit how confidently its patterns can be applied to other populations.
Why might a personality test result change?
A result can change without establishing a lasting change in personality. Answers can differ because you interpret a question differently, have another situation in mind or choose a different response. Different tests, versions, scoring approaches and category boundaries can also produce different labels. A genuine change in what is being measured is another possibility, but two labels alone cannot distinguish these explanations.
For example, imagine a test places people on either side of a category boundary. Two scores close to that boundary could receive different labels, even if the numerical difference were small. This is a hypothetical illustration, not a claim about how PersonalityPro scores its test. To interpret your own results, check what the assessment says it measures and how it reports uncertainty or retesting.
Our article on why personality test results change focuses on this measurement question. Big Five trait studies do not establish that a different PersonalityPro label represents the same trait change, nor do they validate the product.
How can you reflect on a change you notice?
Start with a specific observation rather than a label. You might write, “I ask for more preparation time before meetings than I used to,” and note the situations where that feels true. Compare it with other situations and ask whether the description still fits; a new job, relationship or routine may change the context in which you observe yourself, without establishing a single cause.
Try these questions:
- What behaviour or preference have I noticed, and in which settings?
- Is this a recurring pattern or a recent example?
- What else may differ between the situations I am comparing?
- Does the description help me make a useful choice, or does it leave something important out?
You can also ask a trusted person what they have noticed, while leaving room for their perspective to differ. Use a description as a prompt for conversation, not a diagnosis or proof of another person's motives. If you take the PersonalityPro test, consider its result alongside your own observations and the limits of the assessment.
Frequently asked questions
Can personality change after 30?
Yes. Longitudinal research finds both stability and change in personality traits across the lifespan. It does not mean every person changes in the same way or at the same age.
Does a different test result mean my personality changed?
Not necessarily. A different result can reflect differences in answers, the test or its scoring, as well as possible changes in the characteristics being measured. A result alone cannot establish which explanation applies.
Do personality traits change in the same direction for everyone?
No. A group average describes the people studied together, not a prediction for every individual. People may show different patterns, including little apparent change.
Does Big Five research validate a PersonalityPro type?
No. Research on Big Five traits does not by itself establish that PersonalityPro measures those traits or that its type results have the same evidence. Each assessment needs its own evaluation.
Use the research as context for reflection, then describe your own experience in your own words. Explore how to use a test result or take the PersonalityPro test.