Can Neuroticism Change? Personality Development, Therapy, and Evidence
Updated: Oct 8
Author: Ukrainian Psychological Hub · Published: September 30, 2026 · Editorial Policy
Yes. Neuroticism can change. In modern personality science, neuroticism is a broad dimensional tendency to experience negative emotion more readily, perceive threat or stress more strongly, and recover less easily from distress. It is relatively stable, which is why it is useful as a personality trait, but relative stability does not mean permanence. Longitudinal research shows that people differ in how their traits change across the lifespan, and intervention research shows that measured neuroticism can shift over periods of weeks or months.
The difficult part is deciding what counts as genuine change. A lower questionnaire score after treatment may reflect a lasting shift in a broad personality tendency, a temporary reduction in anxiety or depression, a change in daily habits, a different response style, or some combination of these. That distinction is central to the evidence. The strongest answer is therefore not simply that neuroticism changes, but that several kinds of change must be separated before we can say what changed, how much, for how long, and why.
If you are looking for the basic personality-science definition, start with Neuroticism: What It Is in the Big Five Personality Model. If you are using the everyday label “neurotic” rather than the measured trait, the sibling-cluster article Can Neurotic People Change? Personality, Habits, Therapy, and What Research Shows translates that colloquial question into more precise psychological constructs. This article owns the broader scientific question of neuroticism change: lifespan development, intentional personality change, therapy, measurement, mechanisms, and limits of the evidence.
The Short Answer: Neuroticism Is Stable Enough to Be a Trait and Malleable Enough to Change
Personality traits describe recurring patterns, not fixed quantities. Someone higher in neuroticism has a higher probability of experiencing worry, fear, sadness, irritability, self-consciousness, or stress reactivity across many situations and over time. Yet probabilities can shift. A person can become less reactive on average, recover faster after stress, experience fewer or less intense negative emotional states, or respond differently to those states. When those changes are broad, persistent, and detectable across repeated assessments, they can appear as trait change.
The newest lifespan evidence makes this especially clear. A 2026 meta-analysis integrating 229 longitudinal studies and 230,492 participants found significant individual differences in personality change across all major traits, with neuroticism showing the most pronounced individual differences in change. Those differences remained detectable across the lifespan rather than disappearing after early adulthood. Haehner and colleagues’ meta-analysis therefore supports a picture of personality that combines continuity with differential development.
Intervention evidence points in the same direction. In a systematic review of 207 studies, psychological interventions were associated with changes in personality-trait measures over an average of about 24 weeks; emotional stability, the opposite pole of neuroticism in many Big Five frameworks, showed the largest treatment-associated shift. The overall average change across personality measures was about d = .37, but that number is not a universal expected reduction in neuroticism for an individual. The studies differed in samples, interventions, instruments, designs, and targets. Roberts and colleagues’ 2017 meta-analysis establishes malleability at the literature level, not a guaranteed personal outcome.
What Does “Change in Neuroticism” Actually Mean?
Five different phenomena are often compressed into the word change. Keeping them separate prevents overclaiming and makes intervention findings much easier to interpret.
Mean-Level Change
Mean-level change asks whether the average level of neuroticism in a group rises or falls over time. If the average score in a cohort is lower at age 50 than at age 25, that is mean-level change. It says nothing by itself about whether every individual changed in the same direction. Averages can move while many people remain stable, move more strongly, or move in the opposite direction.
Rank-Order Stability
Rank-order stability asks whether people keep roughly the same relative positions compared with one another. Imagine that everyone in a sample becomes somewhat less neurotic over ten years. The group mean could decline while the most neurotic people at the beginning still tend to be the most neurotic relative to their peers later. Mean-level change and rank-order stability can therefore coexist. The dedicated page Is Neuroticism Stable? Rank-Order Stability, Mean-Level Change, and Life Transitions examines this distinction in detail.
Individual Change
Individual change asks whether a particular person shows a reliable shift relative to their own prior level, ideally beyond what would be expected from measurement error. This is the question people usually mean when they ask, “Can I become less neurotic?” It is also the hardest form of change to establish from one questionnaire result. Repeated measurement, consistent conditions, a suitable instrument, and enough follow-up time make the inference stronger.
State Fluctuation
State fluctuation is short-term movement in emotional experience. Sleep loss, acute stress, grief, conflict, illness, an examination period, or a depressive or anxious episode can make a person report more negative emotion at one assessment. When that temporary state recedes, a neuroticism score may fall even if the person’s more enduring disposition changed little. This is sometimes called a state-artifact problem in research on personality during treatment.
Symptom Change
A reduction in psychiatric symptoms is clinically important, but it is conceptually distinct from personality-trait change. Someone can have less panic, depression, obsessive-compulsive symptoms, trauma-related distress, or generalized anxiety without a large change in broad neuroticism. The reverse is also possible: a broader shift in emotional reactivity may occur while some specific symptoms remain. A personality risk factor, symptom severity, screening result, and clinical diagnosis are different levels of description.
Neuroticism Is Not a Psychiatric Diagnosis
High neuroticism does not diagnose anxiety disorder, depression, obsessive-compulsive disorder, PTSD, ADHD, autism, a personality disorder, or any other clinical condition. Neuroticism is a dimensional trait found throughout the population. Higher levels are associated with vulnerability to several forms of psychopathology, which is why the trait is often called transdiagnostic, but statistical association is not diagnostic identity. The relationship is covered separately in Neuroticism and Mental Health: Why the Trait Is a Transdiagnostic Risk Factor.
This matters when people use words such as treatment, medication, cure, or recovery. Clinical treatment is selected for a person’s symptoms, impairment, diagnosis, and circumstances. A personality score can be relevant context, but neuroticism itself is not an illness that every person at the higher end needs to eliminate. Some people want to change aspects of their emotional reactivity because those patterns interfere with life; others may value sensitivity and vigilance while wanting better recovery, flexibility, or coping.
Why Can a Relatively Stable Personality Trait Change?
A trait is an aggregate pattern built from repeated states, interpretations, habits, behaviors, and transactions with environments. Stability emerges because many of those processes reinforce one another. A person who expects threat may notice threat faster, worry more, avoid more, seek more reassurance, recover more slowly, and repeatedly enter situations that confirm the same expectations. Over time, these recurrent patterns make a trait look stable.
Malleability follows from the same logic. When recurring states, behaviors, interpretations, and environmental contingencies change often enough and for long enough, the distribution of a person’s experiences can shift. Personality change theories differ in how they describe the pathway, but contemporary intervention research increasingly tests changes across multiple timescales rather than treating a trait as a single frozen variable.
The 2026 CHILL trial is especially informative here. In a six-week randomized smartphone intervention with 446 German-speaking adults, self-reported neuroticism decreased with effect sizes ranging from about d = −0.22 to −0.37, and changes remained at a two-month follow-up at about d = −0.16 to −0.33. Peer reports at follow-up changed on one of two measures. State-level strategies produced larger immediate but shorter-lived effects, whereas habit-level strategies showed smaller initial changes that strengthened over time; behavior-focused strategies performed particularly well across assessment methods. The Psychological Science report does not establish one universal recipe, but it provides unusually direct experimental evidence that neuroticism-related patterns can be altered over a short interval and that timescale matters.
Personality Development Across the Lifespan
Neuroticism also changes without a deliberate intervention. Longitudinal personality research has repeatedly found mean-level development across adulthood, while newer analyses emphasize that the average trajectory hides large individual differences. In a six-year New Zealand cohort-sequential study of 10,416 adults ages 19 to 74, neuroticism decreased with age on average, although the authors noted that cohort differences could partly contribute to the pattern. Milojev and Sibley’s longitudinal study is a useful reminder that an age association is not the same thing as a biological aging effect.
The 2026 lifespan meta-analysis strengthens the individual-differences side of the story. Neuroticism did not simply move along one normative track. People varied substantially in their trajectories, and meaningful individual differences in change were detectable across the entire lifespan. This means two statements can both be true: personality becomes more stable in important ways with age, and adults can still change.
For the developmental origins of the trait, see When Does Neuroticism Develop? Personality Development From Childhood to Adulthood. Developmental evidence should not be converted into a deterministic rule such as “your childhood set your neuroticism permanently.” Personality development reflects many interacting influences, and observed trajectories are population-level patterns rather than individual destinies.
Do Life Events Change Neuroticism?
Life events can be associated with personality change, but dramatic events do not automatically rewrite personality in a predictable direction. A preregistered systematic review and meta-analysis of 44 studies, 89 samples, and 121,187 participants found reliable and event-specific personality changes, but average effects were relatively small and inconsistent across events. Effects were generally larger and more consistent in the work domain than in the love domain. Bühler and colleagues’ meta-analysis therefore supports modest, differentiated event-related change rather than a simple “major event changes who you are” rule.
Several mechanisms can produce an apparent event effect. An event can change daily routines, responsibilities, relationships, stress exposure, social expectations, or opportunities for repeated behavior. People also select and shape events partly as a function of preexisting personality. A correlation between an event and subsequent neuroticism does not by itself prove one-way causation. Selection effects, common causes, measurement timing, adaptation, and individual differences all matter.
For the broad question of stability around life transitions, use Is Neuroticism Stable?. The present article treats life events as one route through which personality development may occur, rather than claiming that any particular event necessarily causes neuroticism to rise or fall.
Can People Intentionally Change Neuroticism?
Intentional personality change is now a direct empirical research topic. The key distinction is between wanting to change and actually producing sustained behavioral and experiential change. A goal alone is not evidence that a trait has changed.
A large randomized trial published in PNAS in 2021 tested a three-month digital personality-change intervention in 1,523 participants. People receiving the intervention showed greater self-reported changes in their desired directions than a waitlist group. Friends, relatives, and partners also detected some changes, although observer effects were generally smaller, and the pattern differed depending on whether participants wanted to increase or decrease a trait. Changes persisted through a three-month post-intervention follow-up. Stieger and colleagues’ PEACH trial provides strong evidence that broad personality characteristics can move intentionally in nonclinical populations, while also showing why self-report and observer report should not be treated as interchangeable.
A 2026 analysis from the neuroticism-focused smartphone intervention found that self-efficacy predicted who changed more. Participants with higher self-efficacy showed larger decreases in self-reported neuroticism and larger increases in emotional resilience, and the difference continued into follow-up; growth mindset did not show the same consistent pattern. Krämer and colleagues therefore suggest that believing change is feasible may matter, while simply endorsing a generic belief that personality can grow is not enough.
The practical owner for strategies is How to Lower Neuroticism: Evidence-Based Ways to Reduce Negative Reactivity. To preserve the knowledge architecture, this page focuses on whether and under what evidential conditions change occurs rather than turning the scientific review into a step-by-step self-help program.
What Does the 2026 Systematic Review Say About Neuroticism Interventions?
A 2026 systematic review in Personality Science examined 99 articles covering nonclinical interventions for neuroticism and closely related constructs. The literature was heterogeneous: interventions drew from many theoretical traditions, strategies were often selected in different ways, and proposed mechanisms were not always tested directly. Wright and colleagues’ systematic review and taxonomy concluded that targeted change is plausible and supported by an expanding evidence base, while also showing that the field still lacks a single, well-established mechanism or universally validated intervention package.
That nuance is important for search claims such as “the best way to lower neuroticism.” A research literature can support malleability without supporting a universal best technique. Effects can depend on baseline levels, motivation, context, intervention content, engagement, the specific neuroticism measure, follow-up duration, and whether the outcome is self-report, observer report, daily state data, or behavior.
The review also makes the current evidence architecture clearer. Neuroticism intervention science now includes broad personality-change programs, programs directly targeting neuroticism, interventions targeting related emotional processes, and clinical therapies designed for emotional disorders in which neuroticism is measured as an outcome. Those are related forms of evidence, but they are not interchangeable.
Can Therapy Change Neuroticism?
For treatment-specific evidence, see CBT and Neuroticism: What the Evidence Shows and Unified Protocol and Neuroticism: A Transdiagnostic Treatment Approach.
For a treatment-focused review of what psychotherapy can and cannot change, see Therapy for High Neuroticism: What Treatment Can and Cannot Change.
Yes, measured neuroticism can change during psychotherapy, and some controlled studies suggest changes extend beyond immediate symptom improvement. The broader intervention meta-analysis found emotional stability to be the Big Five domain most responsive to treatment-associated change. But “therapy changes neuroticism” is still too broad unless we ask what therapy, what population, what instrument, what comparison condition, and whether symptom change was separated statistically from trait change.
One of the most studied examples is the Unified Protocol, a transdiagnostic cognitive-behavioral treatment for emotional disorders. In a randomized trial involving 223 treatment-seeking adults with principal anxiety disorders, the Unified Protocol group had lower neuroticism at week 16 than both symptom-focused CBT and waitlist conditions. Differences remained in analyses controlling for concurrent anxiety and depression fluctuations. Sauer-Zavala and colleagues’ randomized trial supports a treatment-related effect on neuroticism in a clinical population; it does not mean that Unified Protocol treatment should be prescribed simply because someone has a high personality score.
Later work has examined the timing of that change more closely. In a clinical trial with 38 adults receiving up to 12 sessions of the Unified Protocol, neuroticism showed state-level change by session 6 and evidence consistent with trait-level change by session 12, while changes in neuroticism and anxiety were dynamically related. The 2024 Behavior Therapy study is particularly useful because it directly addresses the question of whether early score reductions might be temporary state artifacts.
A 2026 randomized study of 70 adults with emotional disorders compared treatment sequencing and six- versus twelve-session courses. Neuroticism changes did not significantly differ by duration during the first six sessions, but participants in the full twelve-session condition showed greater reductions during sessions 7–12; those later reductions remained significant when depressive and anxiety symptoms were controlled. The authors interpreted the pattern as evidence that brief treatment may show state-level changes while more extensive treatment may be needed for lasting trait change. Stumpp and colleagues’ 2026 study strengthens the case for separating early state movement from more persistent trait movement.
Therapy Evidence Does Not Mean Neuroticism Is a Disease
Psychotherapy studies often recruit people because they have anxiety, depression, or other emotional disorders—not because a personality test placed them above a particular neuroticism percentile. Their treatment targets include distress, impairment, avoidance, maladaptive emotion regulation, worry, fear, behavioral patterns, or a diagnosed condition. Neuroticism may be measured because it captures a broad vulnerability dimension that overlaps with these processes.
The distinction matters clinically. A person can benefit from therapy without needing their personality to become “normal.” A therapy can reduce symptoms while leaving broad trait standing relatively similar. A person can also show a statistically detectable personality shift that is smaller than the practical change they notice in daily life. Clinical significance, statistical significance, and personality-trait change are separate questions.
This is why treatment effects should be described as intervention-associated changes in measured traits unless the design supports a stronger causal inference. Random assignment, active controls, symptom adjustment, multiple methods, and follow-up strengthen causal interpretation. A simple before-and-after score in an uncontrolled sample does not establish that therapy itself caused a durable personality change.
Preliminary Therapy Findings: Why Study Design Matters
A September 2026 pilot study tested ten weeks of therapist-supported internet-delivered affect-focused psychodynamic therapy in 30 participants with mixed anxiety and depressive symptoms. Neuroticism, measured with the IPIP-NEO 300, decreased from pre- to post-treatment with a reported Cohen’s d of 0.64 and remained lower at six-month follow-up. Changes in defense-mechanism adaptiveness predicted changes in neuroticism. Lindegaard and colleagues explicitly described the work as an uncontrolled pilot and called for randomized replication.
This is exactly the kind of result that should be called promising rather than definitive. Without a randomized control group, improvements can reflect treatment, natural recovery, expectancy, regression toward the mean, repeated testing, concurrent changes in anxiety or depression, or other influences. Follow-up improves the evidence for persistence, but persistence alone does not identify the cause.
The contrast between a pilot study, a randomized clinical trial, a large nonclinical RCT, and a meta-analysis illustrates why evidence hierarchy matters. They answer different questions. A small pilot can establish feasibility and generate mechanism hypotheses. A randomized trial strengthens causal inference for a specific intervention and sample. A meta-analysis synthesizes a broader literature but inherits heterogeneity and design limitations from the included studies.
State Change Versus Trait Change: The Central Measurement Problem
Neuroticism questionnaires ask people to summarize tendencies that involve negative emotionality. During an anxious or depressive episode, a person’s current mood can influence how they answer broad self-descriptions. If distress improves, the person may endorse fewer high-neuroticism items even if their underlying long-term disposition has not changed to the same degree. Conversely, a real shift in recurring emotional patterns can also contribute to symptom improvement. The two processes can be intertwined.
Researchers address this problem in several ways. They can measure symptoms and neuroticism repeatedly, model their temporal relationships, statistically adjust for concurrent symptom changes, wait long enough to see whether the trait score remains changed after acute symptoms settle, use multiple informants, include behavioral or intensive longitudinal measures, and compare active treatments that differ in what they target. None of these methods is perfect alone, but converging evidence makes a trait-change claim more persuasive.
The 2024 and 2026 Unified Protocol studies are valuable precisely because they examine timing and symptom covariation rather than assuming every post-treatment neuroticism decrease is a lasting trait transformation. The current evidence suggests that early reductions can contain a state component and that longer or more repeated change may be needed before a trait interpretation becomes stronger.
How Neuroticism Change Should Be Measured
There is no universal neuroticism score that can be compared across every questionnaire. Different personality models operationalize the broad domain differently, use different items and response scales, and may label the dimension differently. The Neuroticism Test: What It Measures and How to Interpret Results page covers instrument-specific interpretation; the Neuroticism Score: What High, Average, and Low Scores Mean page explains why a raw score or percentile only has meaning within a particular scoring system and reference population.
NEO Instruments
NEO PI-R, NEO-PI-3, and NEO-FFI measures place Neuroticism within the Five-Factor Model, but they differ in length and facet resolution. A score shift on a NEO instrument should be interpreted using that instrument’s scoring rules, reliability, normative framework, and population. A change of several raw-score points cannot be translated automatically into an equivalent change on the BFI-2, IPIP-NEO, or an Eysenck measure.
BFI-2 Negative Emotionality
The BFI-2 labels the comparable broad domain Negative Emotionality rather than Neuroticism. The construct overlap is substantial, but naming, item content, facet structure, scoring, and norms remain instrument-specific. In many Big Five discussions, lower neuroticism corresponds directionally to greater emotional stability, but the phrase should not be treated as a universal scoring conversion. See Neuroticism vs Emotional Stability: Two Ends of the Same Big Five Dimension? for the construct-level distinction.
IPIP and Eysenck Measures
IPIP item pools support multiple public-domain implementations, including longer inventories that map onto Five-Factor traits. The 2026 affect-phobia pilot, for example, used the IPIP-NEO 300 as its primary neuroticism outcome. Eysenck instruments assess Neuroticism within a different personality model. Results across these families can inform the same broad scientific question, but raw scores, cutoffs, facets, and psychometric properties should not be merged as if they were one scale.
What Makes a Change Claim Stronger?
A stronger individual change claim uses the same validated instrument at comparable time points, considers measurement error, avoids interpreting a single percentile outside its normative sample, and ideally includes multiple assessments rather than only one before and one after score. In research, measurement invariance, reliable-change methods, latent-variable models, observer reports, and longer follow-up can strengthen interpretation. In everyday self-tracking, a questionnaire can be informative, but one result should not be treated as a diagnosis or proof of permanent personality change.
How Much Can Neuroticism Change?
There is no scientifically defensible universal answer such as “neuroticism can drop by 20 percent” or “you can move one standard deviation.” The magnitude depends on the measure, sample, baseline level, intervention, follow-up period, desired direction, and analytic method.
The 2017 intervention meta-analysis reported an overall average personality-trait change of about d = .37 over an average 24 weeks, with emotional stability showing the largest treatment-associated shift. The 2026 six-week smartphone RCT reported smaller self-report neuroticism effects, roughly d = −0.22 to −0.37, with somewhat smaller but persistent effects at two months. The Unified Protocol studies reported clinically relevant group differences and temporal patterns in clinical samples rather than a universal population expectation. These are study-level effect sizes, not personal score forecasts.
A small standardized effect can still matter if it persists and influences many recurring situations. A larger short-term effect can matter less as a personality result if it disappears when an acute episode ends. Duration, breadth, and cross-situational consistency are part of what turns a change in state into evidence about a trait.
How Fast Can Neuroticism Change?
Research now detects changes on several timescales. State-level emotional reactions can change within days or even moments. Habit patterns can shift over weeks. Intervention studies can detect personality-measure changes within six weeks, several months, or a course of psychotherapy. Lifespan studies track changes over years and decades.
The newest experimental work warns against assuming that faster is always more durable. In the 2026 smartphone trial, state-oriented strategies produced larger immediate effects that were comparatively shorter-lived, while habit-oriented strategies started smaller but strengthened over time. The 2026 Unified Protocol study similarly found that early treatment changes could look more state-like, with stronger evidence for trait change emerging later in a longer treatment course.
A search for the fastest possible reduction therefore asks the wrong scientific question. The more informative questions are whether change generalizes beyond the training context, remains after the intervention, appears on more than one measurement method, and changes recurring patterns rather than only the emotional state present at assessment.
Does Neuroticism Usually Decrease With Age?
Many adult-development studies find average decreases in neuroticism or increases in emotional stability, especially across portions of adulthood. But this is a mean-level statement, not a rule that every individual automatically becomes calmer with age. The 2017 New Zealand study found average age-related decreases in neuroticism while also identifying possible cohort contributions. The 2026 meta-analysis found enduring individual differences in change throughout the lifespan.
Age trends can differ across sex, cohort, culture, measure, historical period, and sample. Cross-sectional differences between younger and older adults are especially vulnerable to cohort effects because people born in different periods have lived through different social and historical conditions. Longitudinal designs reduce some of that ambiguity but introduce other challenges such as attrition and retest effects.
The broad conclusion is that adulthood does not close a window of personality plasticity. Average developmental tendencies coexist with considerable heterogeneity. Becoming older makes personality history longer; it does not turn a trait into an immutable property.
Culture, Population, and Generalizability
A finding from one population should not be treated as a universal human change law. The 2026 neuroticism smartphone trials used a German-speaking adult sample, and the self-efficacy analysis reported that most participants were women and lived in Switzerland, Germany, or Austria. Unified Protocol studies recruited clinical samples with emotional disorders, and the 2026 duration study reported a majority-White sample. These designs can answer important causal questions while still leaving generalizability open.
Cross-cultural research also raises measurement questions: translated items, response styles, norms, factor structures, and cultural meanings can influence score comparisons. The live cluster page Neuroticism Across Cultures and Countries: What Cross-Cultural Research Shows owns that broader issue. For change research, the practical implication is straightforward: replication across languages, countries, age groups, clinical statuses, and socioeconomic contexts matters before an intervention effect is described as universal.
Does Lower Anxiety Mean Neuroticism Changed?
Not necessarily. Anxiety is an emotion, a symptom dimension, and, in some contexts, part of a clinical disorder. Trait anxiety is another stable individual-difference construct. Neuroticism is broader. These constructs overlap, sometimes strongly, but they are not interchangeable.
If a person’s anxiety symptoms fall during treatment, a neuroticism self-report may also fall because the person is currently experiencing less distress. That can be a real and valuable improvement without proving durable trait change. Stronger evidence for trait change comes when the change persists, spans multiple contexts or methods, and cannot be explained fully by concurrent symptom movement.
The same logic applies to depression, stress, and negative affect. A person can feel better this week without having transformed a broad trait, and a broad trait can change gradually without every negative emotional episode disappearing. Neuroticism and Stress: Perceived Stress, Reactivity, and Recovery covers the trait–stress relationship rather than personality change itself.
Can Medication Change Neuroticism?
Medication is not prescribed simply to treat a high neuroticism score. Pharmacologic decisions are made for diagnosable conditions, symptoms, risks, medical history, prior response, side effects, and patient preferences. Some clinical trials have reported changes in neuroticism measures during pharmacologic treatment, which is scientifically relevant to questions about trait and state, but that evidence does not create an indication called “neuroticism treatment.”
For this reason, medication evidence should not be converted into advice to use an antidepressant or other drug to become less neurotic. A measured trait can shift while a disorder is being treated, and some shifts may exceed what is explained by symptom reduction, but the clinical target and prescribing rationale remain diagnosis- and patient-specific.
Can Neuroticism Be Cured?
“Cure” is a disease term and neuroticism is a personality dimension. The evidence supports change, not the idea that a normal-range trait needs eradication. A person may become less reactive, worry less, recover faster, change habits, reduce psychiatric symptoms, or move lower on a validated neuroticism measure. Those are meaningful outcomes, but they are better described as change than cure.
The same point prevents a hidden value judgment. Lower neuroticism is associated at the group level with many favorable outcomes, yet the goal of psychological care is not to make everyone converge on one personality profile. The relevant question is whether a pattern causes distress or impairment and whether changing it serves the person’s goals.
What the Evidence Still Cannot Tell Us
First, long-term durability remains less certain than short-term malleability. Several high-quality interventions now include follow-up, but many follow-ups last months rather than years. Personality is defined partly by persistence, so longer observation is especially valuable.
Second, mechanisms remain under active study. The 2026 systematic review found substantial heterogeneity in intervention strategies and incomplete testing of proposed mediators. The newer trials suggest roles for behavior, habits, state regulation, and self-efficacy, but the field has not reduced neuroticism change to one causal pathway.
Third, self-report remains central. Self-reports are appropriate because personality includes subjective emotional experience, but expectations, demand characteristics, current mood, and response styles can influence them. Observer reports, daily assessments, behavioral measures, and multimethod designs provide useful convergence and sometimes show smaller effects.
Fourth, clinical and nonclinical evidence should not be merged uncritically. A therapy trial in people with anxiety disorders asks a different question from a personality coaching app used by adults who simply want to become less neurotic. Both inform malleability, but baseline severity, motivation, mechanisms, risks, and outcome meanings differ.
Fifth, instrument differences matter. A change on NEO-FFI Neuroticism, BFI-2 Negative Emotionality, IPIP-NEO Neuroticism, or an Eysenck Neuroticism scale is evidence tied to that measure and study design. Researchers can synthesize across instruments statistically, but an individual should not treat raw scores from different tools as interchangeable.
What a Strong Claim of Neuroticism Change Looks Like
A convincing claim has several features: the construct is measured with a validated instrument; the before-and-after assessments are comparable; change exceeds plausible measurement noise; the effect persists beyond an acute mood shift; symptoms and states are considered rather than ignored; the change appears across repeated assessments or more than one method; and the study design provides a credible counterfactual, ideally through randomization or strong longitudinal modeling.
The evidential standard should match the strength of the claim. “Participants reported lower neuroticism after treatment” requires less evidence than “therapy caused durable trait change.” “This person’s percentile decreased” requires less inference than “this person became permanently more emotionally stable.” Personality science becomes clearer when those statements are not treated as synonyms.
When Does Neuroticism Change Matter Clinically?
Trait change matters clinically when it helps explain durable changes in vulnerability, functioning, and recurring emotional patterns. It can also matter theoretically because neuroticism is associated with broad mental-health risk. But clinical decisions should still begin with the person’s actual symptoms, functioning, diagnosis when relevant, and goals.
If someone is experiencing persistent anxiety, depression, obsessive-compulsive symptoms, trauma-related symptoms, severe mood changes, or other clinically significant distress, the important task is assessment of those symptoms rather than interpreting a personality score as a diagnosis. Neuroticism can provide context about broad vulnerability, but it cannot tell a clinician which disorder is present or which treatment is appropriate.
For people without a clinical disorder, intentional personality change research suggests that desired changes are possible. The ethical and practical focus should remain on personally meaningful functioning rather than on chasing a supposedly ideal percentile.
Practical Interpretation: What Can Change Even If the Trait Moves Slowly?
Daily life can improve before a broad trait score changes substantially. A person may worry for less time, recover from conflict faster, tolerate uncertainty more effectively, reduce avoidance, sleep more consistently, seek less reassurance, respond to criticism with less escalation, or notice negative emotion without reorganizing the entire day around it. These are narrower processes than neuroticism, but repeated changes in them may contribute to broader trait change over time.
This is one reason personality change should not be reduced to a score target. The broad trait is useful because it summarizes many tendencies. Real life happens at the level of situations, emotions, interpretations, choices, habits, and relationships. A meaningful intervention can therefore improve functioning even when the trait measure moves modestly.
For readers seeking practical evidence rather than the science of malleability itself, the live companion page How to Lower Neuroticism: Evidence-Based Ways to Reduce Negative Reactivity owns that intent and should be used instead of stretching this pillar into a self-help checklist.
Frequently Asked Questions
Can neuroticism really change?
Yes. Longitudinal studies show individual personality change across the lifespan, and randomized interventions show that neuroticism-related trait measures can change over weeks or months. The size and durability of change vary across people, methods, and contexts.
Is neuroticism permanent?
No. Neuroticism is relatively stable, which means past levels predict future levels reasonably well, but it is not fixed. Stability and change can coexist: people may retain much of their relative ordering while average levels and individual trajectories shift.
Does neuroticism decrease with age?
Often on average, but not for everyone. Some longitudinal studies find age-related decreases in neuroticism or increases in emotional stability, while newer meta-analytic evidence shows substantial individual differences in change throughout the lifespan.
Can therapy lower neuroticism?
Therapy can be associated with lower neuroticism scores, and randomized studies of the Unified Protocol have found changes that cannot be explained only by simultaneous anxiety and depression fluctuations. Therapy should still target the person’s actual clinical problem rather than treating a high personality score as a diagnosis.
How long does it take to change neuroticism?
There is no universal timeline. Experimental studies have detected changes within six weeks; other interventions run for several months; clinical work suggests early score movement may be more state-like and stronger evidence for trait change may emerge later. Lifespan development unfolds over years.
Does feeling less anxious mean my neuroticism changed?
Not necessarily. Anxiety symptoms and negative emotional states overlap with neuroticism but are not identical to it. A durable trait-change claim is stronger when improvement persists beyond an acute episode and appears across repeated or multimethod assessments.
Can I change neuroticism if I do not have a mental health disorder?
Yes, at least at the group level in controlled studies. Nonclinical digital interventions have produced desired personality changes, including lower neuroticism. That evidence does not imply everyone needs to change or that the same intervention will work equally well for every person.
Can medication treat neuroticism?
Medication is prescribed for clinical conditions and symptoms, not simply for a high neuroticism score. Changes in personality measures during medication trials are scientifically interesting but do not make neuroticism a medication indication.
Is becoming less neurotic the same as becoming more emotionally stable?
Directionally, many Big Five models treat neuroticism and emotional stability as opposite poles of a broad dimension. Measurement still depends on the instrument. BFI-2 Negative Emotionality, NEO Neuroticism, IPIP scales, and Eysenck scales cannot be converted by comparing raw scores directly.
Can one personality test prove that I changed?
No. A single before-and-after score can be affected by measurement error, mood, context, and test conditions. Repeated assessment with the same validated instrument, relevant norms, enough time, and ideally additional methods provides stronger evidence.
Does high neuroticism need to be changed?
Not automatically. High neuroticism is a personality-trait level, not a diagnosis. Change becomes personally or clinically relevant when recurring emotional patterns create distress or impairment, or when a person has a clear and informed goal to change how they respond.
Conclusion
Neuroticism is neither a fixed essence nor a temporary mood. It is a relatively stable dimensional personality trait built from recurring patterns of emotional experience and response. Modern longitudinal research shows meaningful individual differences in how it develops across the lifespan. Intervention research shows that measured neuroticism can change intentionally, including in randomized nonclinical trials and psychotherapy studies.
The strongest evidence also makes the simple answer more precise. Trait change must be distinguished from mean-level development, temporary state fluctuation, symptom relief, and measurement noise. Therapy can change neuroticism measures without turning neuroticism into a disorder. Life events can be associated with change without determining an individual trajectory. A score can move without providing a universal clinical interpretation. And a person can improve substantially in daily functioning even when a broad personality trait changes only modestly.
The 2026 literature moves the field beyond the question of whether change is possible and toward harder questions: which processes change first, which changes persist, who benefits from which strategies, how observer and behavioral evidence converge with self-report, and how well findings generalize across populations. The answer to “Can neuroticism change?” is yes. The scientifically important work now concerns the form, mechanism, magnitude, durability, and meaning of that change.
Related Articles
Neuroticism: What It Is in the Big Five Personality Model — the core construct, Big Five meaning, and diagnostic boundaries.
Is Neuroticism Stable? Rank-Order Stability, Mean-Level Change, and Life Transitions — the dedicated stability and developmental-change page.
How to Lower Neuroticism: Evidence-Based Ways to Reduce Negative Reactivity — the practical intervention companion page.
Can Neurotic People Change? Personality, Habits, Therapy, and What Research Shows — the sibling-cluster bridge for everyday “neurotic person” language.
Neuroticism Across Cultures and Countries: What Cross-Cultural Research Shows — measurement and interpretation across cultural contexts.
References
Bühler, J. L., Orth, U., Bleidorn, W., Weber, E., Kretzschmar, A., Scheling, L., & Hopwood, C. J. (2024). Life Events and Personality Change: A Systematic Review and Meta-Analysis. European Journal of Personality, 38(3), 544–568. https://doi.org/10.1177/08902070231190219
Haehner, P., Hopwood, C. J., Schellenberg, L., Schwaba, T., & Bleidorn, W. (2026). Individual Differences in Personality Trait Changes Across the Lifespan: A Meta-Analysis of Longitudinal Studies. Psychological Bulletin, 152(4), 420–447. https://doi.org/10.1037/bul0000525
Krämer, M. D., Wright, A. J., Haehner, P., Zimmermann, J., Flückiger, C., Hopwood, C. J., & Bleidorn, W. (2026). Self-Efficacy Predicts Differential Neuroticism Change in a Smartphone-Based Intervention. Journal of Personality and Social Psychology. Advance online publication. https://doi.org/10.1037/pspp0000610
Lindegaard, T., Berg, M., Käll, A., Lockman, J., Schönberg, E., Björklund, M., Frederick, R. J., & Andersson, G. (2026). Internet-Delivered Affect Phobia Therapy for Neuroticism: Results From an Uncontrolled Pilot Study With 6-Month Follow-Up. Psychodynamic Psychiatry, 54(3), 511–531. https://doi.org/10.1521/pdps.2026.54.3.511
Milojev, P., & Sibley, C. G. (2017). Normative Personality Trait Development in Adulthood: A 6-Year Cohort-Sequential Growth Model. Journal of Personality and Social Psychology, 112(3), 510–526. https://doi.org/10.1037/pspp0000121
Roberts, B. W., Luo, J., Briley, D. A., Chow, P. I., Su, R., & Hill, P. L. (2017). A Systematic Review of Personality Trait Change Through Intervention. Psychological Bulletin, 143(2), 117–141. https://doi.org/10.1037/bul0000088
Sauer-Zavala, S., Fournier, J. C., Steele, S. J., Woods, B. K., Wang, M., Farchione, T. J., & Barlow, D. H. (2021). Does the Unified Protocol Really Change Neuroticism? Results From a Randomized Trial. Psychological Medicine, 51(14), 2378–2387. https://doi.org/10.1017/S0033291720000975
Stieger, M., Flückiger, C., Rüegger, D., Kowatsch, T., Roberts, B. W., & Allemand, M. (2021). Changing Personality Traits With the Help of a Digital Personality Change Intervention. Proceedings of the National Academy of Sciences, 118(8), e2017548118. https://doi.org/10.1073/pnas.2017548118
Stumpp, N. E., Southward, M. W., & Sauer-Zavala, S. (2024). Assessing Theories of State and Trait Change in Neuroticism and Symptom Improvement in the Unified Protocol. Behavior Therapy, 55(1), 93–105. https://doi.org/10.1016/j.beth.2023.05.005
Stumpp, N. E., Southward, M. W., Hines, A., Kushner, M. L., Schäuffele, C., Fruhbauerova, M., Bridges, E., Rahman, A., & Sauer-Zavala, S. (2026). When and Under What Circumstances Does Neuroticism Change in the Unified Protocol?. Psychotherapy Research, 36(4), 785–796. https://doi.org/10.1080/10503307.2025.2521779
Wright, A. J., Haehner, P., Hopwood, C. J., & Bleidorn, W. (2026). A Systematic Review and Taxonomy of Neuroticism Interventions for the General Public. Personality Science, 7, 1–32. https://doi.org/10.1177/27000710261421531
Wright, A. J., Haehner, P., Andrae, R., Lubczyk, T., Hopwood, C. J., & Bleidorn, W. (2026). Effects of a Theory-Based Smartphone Intervention to Decrease Neuroticism in the General Public. Psychological Science. Advance online publication. https://doi.org/10.1177/09567976261476962