Mental Flexibility: What it Is, What it is for and How to Train it

The meeting gets moved from Thursday to Tuesday, and your whole week folds like a bad umbrella. You’d planned the reports, the dentist, the quiet Wednesday you were counting on. A colleague shrugs, rewrites two lines in her calendar and carries on with her coffee. You’re still staring at the invite, jaw tight, drafting an email you know you shouldn’t send. Same news. Wildly different response. Neither of you is smarter or calmer by nature; one of you simply bends where the other braces. The difference shows up over the next three days, not the next three minutes.

That capacity to bend is mental flexibility, and it’s one of the most useful and least discussed skills in psychology. It shows up when a plan collapses, when a friend sees things differently, when an old coping habit stops working, when you have to switch from spreadsheet brain to toddler brain at 6 p.m. Rigidity, its opposite, isn’t a character flaw. It’s a pattern, and patterns can be changed. The heavy version, which clinicians call cognitive rigidity, travels with anxiety, depression, burnout and plain exhaustion, so it deserves more respect than the advice to just relax.

Bending isn’t the same as caving.

This article explains what mental flexibility is, what it’s for, how researchers measure it, and the evidence-based ways to train it, including a few popular methods that don’t work as advertised. No gimmicks, and no pretending a phone app will do it for you.

Along the way you’ll meet three related ideas that often get blurred: cognitive flexibility, psychological flexibility and regulatory flexibility.

What is mental flexibility?

Mental flexibility is the ability to adjust your thinking, attention and behavior when circumstances change, instead of repeating what worked before. It means noticing that a strategy has stopped working, shifting perspective, and choosing a different response without losing sight of what matters to you.

The term is an umbrella, not a single scientific construct. Psychologists use more precise labels for its parts, which we’ll sort out in the next section. But the everyday meaning is clear enough: a mind that can switch gears, hold two ideas at once, and adapt to surprises.

The most useful definition I know comes from Todd B. Kashdan and Jonathan Rottenberg, who reviewed the literature in a 2010 paper titled Psychological Flexibility as a Fundamental Aspect of Health. They described psychological flexibility as a range of abilities: recognizing and adapting to different situational demands, shifting mindsets or behavioral repertoires when those strategies compromise functioning, keeping balance among important life domains, and staying aware, open and committed to behavior that fits deeply held values. They treated it not as a trait you either have or lack but as a set of dynamic processes that unfold over time.

Notice what is missing from that list: constant change for its own sake. Flexibility isn’t about being endlessly adaptable or spineless. A flexible person can hold firm on a principle while changing the method. The skill is knowing which is which.

Imagine Noor, an illustrative composite who runs a small bakery. When her oven fails on a Saturday morning, she doesn’t cancel the day. She calls a neighbor with a bigger oven, swaps the menu toward no-bake items, and tells her regulars the truth. Her goal (serve good bread to her community) stayed fixed. The route changed three times before noon.

Now picture the same morning for someone rigid. The oven is broken, therefore the day is ruined, therefore nothing can be done. The thought hardens into a rule, and the rule blocks every alternative.

Researchers generally agree on a few features of the flexible mind:

It responds to context, meaning the same event may call for different reactions in different settings. It uses a repertoire, meaning more than one tool in the kit. It tracks feedback, meaning it notices whether the current approach is working. And it stays tied to values, so that changing course serves a purpose and isn’t mere drift.

That four-part pattern will come back when we get to training. For now, hold onto the picture: not a bendable reed in the wind, but a good driver who adjusts to the road without forgetting the destination.

What are the types of mental flexibility?

Researchers distinguish at least four overlapping types: cognitive flexibility, psychological flexibility, emotional or regulatory flexibility and behavioral flexibility. They have different definitions, different measuring tools and different literatures, though they interact in daily life.

The first, cognitive flexibility, is the narrowest and most testable. It’s usually treated as a component of executive function, the brain’s set of control processes, and it’s what many people mean when they say “mental agility.”

The second, psychological flexibility, is broader. It comes from clinical psychology, particularly acceptance and commitment therapy (ACT), where it refers to the ability to be present with difficult thoughts and emotions while choosing actions that fit your values. It’s less about speed of switching and more about not being governed by your own mental noise.

The third, emotional or regulatory flexibility, concerns how well you vary emotion-regulation strategies to match circumstances. There’s no single best way to cope, and what helps in one setting may backfire in another.

The fourth, behavioral flexibility, is the broadest and appears in animal research as well: changing behavior when rewards or rules shift.

Why does the distinction matter? Because training one doesn’t automatically build the others. A person who aces a card-sorting task may still be unable to let go of a grudge. Someone who is emotionally agile may be slow at switching between spreadsheets. Researchers use the terms for different phenomena, and popular articles that blur them often overstate what a single exercise can do.

A practical way to hold it together is by asking which kind of stuck you are. Stuck in a task or rule? Probably cognitive. Stuck with a feeling or thought you can’t tolerate? Psychological. Stuck using the same coping strategy that no longer works? Regulatory. Stuck repeating the same behavior despite new circumstances? Behavioral.

The answer points to different training.

How does the brain switch gears?

It does so through executive functions, a set of control processes mostly supported by the prefrontal cortex and its connections. Cognitive flexibility, the ability to shift between tasks or mental sets, is one of the three core functions, alongside working memory updating and inhibitory control.

The standard framework comes from Akira Miyake and colleagues, whose 2000 study in Cognitive Psychology tested whether executive functions are one thing or several. They examined three often-proposed functions: mental set shifting, information updating and monitoring, and inhibition of prepotent responses. Statistical modeling showed that the three were moderately correlated yet clearly separable, which became known as the unity and diversity of executive functions. Shifting, for instance, was most strongly related to performance on the Wisconsin Card Sorting Test.

That test has a history of its own. Esta A. Berg published an early version in 1948 as a simple, objective technique for measuring flexibility in thinking. People sort cards by color, shape or number, and the sorting rule silently changes. Flexible performers notice that their old rule stopped working and switch. Rigid performers keep sorting by the old rule, an error called perseveration. The test has been used for decades in neuropsychology, especially to detect frontal-lobe problems.

Developmental psychologist Adele Diamond, in a 2013 review in the Annual Review of Psychology, described the three core executive functions as inhibition, working memory and cognitive flexibility, and argued that flexibility builds on the other two and tends to develop later in childhood. To change perspective, she noted, you must inhibit your previous view and load a different one into working memory. It’s a layered skill.

What happens when you switch? Roughly: you notice that the current approach isn’t working, you suppress the old rule, you activate a new one, and you keep the new rule active while you carry it out. Each step takes effort, which explains why switching has a measurable switch cost, a slowdown and increase in errors right after a change.

Several things can sap flexibility. Stress narrows attention and pushes people toward habitual responses. Fatigue and poor sleep impair executive control. Anxiety and depression are often associated with more rigid, repetitive thinking such as rumination. Age is a factor too: flexibility typically peaks in young adulthood and declines gradually, though lifestyle seems to matter a lot.

Take Raj, an illustrative composite who’s an air-traffic scheduler on a night shift. After a week of broken sleep he finds that he keeps entering the old schedule template even after it’s been replaced. It’s not stupidity. It’s executive control running on fumes.

A caveat on interpretation: lab tasks like card sorting measure one slice of flexibility under artificial conditions. Scores on them correlate only modestly with real-life adaptability, so don’t treat any single test as a verdict on a person.

What is mental flexibility good for?

It helps you cope with stress, adapt at work, keep relationships healthy and stay well psychologically. Across research areas, greater flexibility goes with better adjustment, while rigid patterns of thought and behavior show up in many mental health problems.

Here are the main areas where flexibility seems to matter, with the usual caveat that most of the evidence is correlational:

• Stress and resilience. People who can shift strategies as demands change tend to recover better from setbacks and adversity.
• Mental health. Todd B. Kashdan and Jonathan Rottenberg‘s review linked low psychological flexibility to depression, anxiety, eating disorders and other problems, and higher flexibility to better well-being.
• Work and learning. Switching between tasks, updating plans and taking feedback are central to modern jobs and to learning new material.
• Relationships. Seeing another person’s perspective and adjusting your response is the core of conflict resolution and empathy.
• Creativity and problem solving. Dropping an unhelpful approach and trying a different frame is often what separates a solved puzzle from a stuck one.
• Healthy aging. Maintaining flexible thinking is associated with better everyday functioning in later life.

The evidence for each is uneven. The links with mental health are among the best documented, though most studies can’t show which direction the effect runs: does rigidity contribute to distress, or does distress make people rigid? Probably both. The work-performance and creativity links are plausible but more mixed, and effect sizes in many studies are modest.

Consider Marcus, an illustrative composite whose startup has just lost its biggest client. A rigid response is to repeat the old pitch louder. A flexible response is to ask what changed, test two new offers and talk to customers. Same pressure, different outcomes. That doesn’t mean flexibility guarantees success; plenty of flexible people still lose clients. It means the range of options is wider.

A subtle point is that flexibility isn’t always good. Staying committed to a worthwhile long-term goal despite discomfort is a virtue, and so is holding firm on ethical lines. A person who changes plans at every whim is not flexible in the useful sense; they’re unmoored. That’s why definitions of psychological flexibility include tying behavior to values.

Another caution: advice to “be more flexible” can be used to pressure people to accept unfair or harmful situations. Adapting to a bullying boss is not a sign of healthy flexibility. Sometimes the adaptive move is to leave, to push back, or to ask for help.

Flexibility serves goals. It isn’t a goal in itself.

What is psychological flexibility in acceptance and commitment therapy?

In acceptance and commitment therapy (ACT), psychological flexibility means being fully in contact with the present moment, open to your thoughts and feelings, and able to change or persist in behavior in line with your chosen values. It’s the central target of the therapy.

The model was laid out by Steven C. Hayes and colleagues in a 2006 paper in Behaviour Research and Therapy that summarized ACT’s theory, processes and outcomes. Hayes is the co-developer of ACT, which belongs to the so-called “third wave” of cognitive and behavioral therapies. The paper proposed six interrelated processes that together make up flexibility, and a mirror image of six processes that produce inflexibility and suffering.

The six flexibility processes, in brief:

• Acceptance: allowing difficult feelings to be present without fighting them.
• Cognitive defusion: stepping back from thoughts so they’re seen as thoughts, not facts (“I’m having the thought that I’ll fail”).
• Present-moment awareness: paying attention to what’s happening here and now, with openness.
• Self-as-context: a stable sense of “the one who notices” that isn’t defined by any single thought or label.
• Values: clarity about what matters most, the compass for direction.
• Committed action: taking steps, even small or uncomfortable ones, in line with those values.

The inflexibility counterparts include avoiding unwanted experiences, getting fused with thoughts, dwelling on the past or future, and drifting from values into impulsive or avoidant behavior.

Think of Elise, an illustrative composite who wants to apply for a promotion but is gripped by the thought “I’m not leadership material.” The inflexible response is to treat the thought as truth and skip the application. The flexible response is to notice the thought, thank her mind for the warning, remember that she values growth and contribution, and send the application anyway with sweaty palms.

Notice that ACT doesn’t aim to eliminate anxiety or doubt. It changes the relationship to them. That’s an important contrast with older approaches that focus on changing the content of thoughts.

The evidence base for ACT is substantial across anxiety, depression, chronic pain and other conditions, with many randomized trials, though the strength of evidence varies by problem and some trials have methodological weaknesses. Critics have also questioned whether the six processes are truly distinct and whether ACT adds much beyond other cognitive and behavioral therapies. Those debates continue.

The point for training purposes is practical. If you want to build psychological flexibility, you don’t practice puzzles; you practice noticing, allowing and acting on values. Those are skills with names, exercises and, importantly, therapists who teach them.

How do you match your coping strategy to the situation?

Blunt claim: there’s no best coping strategy, only a best fit. Reappraising a stressful situation, venting, distracting yourself and accepting a feeling can each help or hurt depending on context. Flexibility in choosing among them is itself a marker of resilience.

The psychologist George A. Bonanno has spent much of his career studying how people cope with loss and trauma. In a 2013 paper with Charles Burton in Perspectives on Psychological Science, he argued that what predicts good adjustment is less a favorite strategy than regulatory flexibility, the ability to vary regulation strategies in response to changing demands. The framework has three parts.

First, sensitivity to context: noticing what a situation requires, such as whether it is controllable, whether others are watching, whether the stress is short or long. Second, a repertoire of strategies: having several tools available, from expressing feelings to suppressing them briefly, from reappraising to distracting. Third, responsiveness to feedback: noticing whether the chosen strategy is working and adjusting if it’s not.

Consider a few contrasts to see why context matters. Suppressing emotion during a tense negotiation might help you perform; suppressing it for months after a loss tends to cost you. Reappraisal works well when a situation is changeable in meaning; it can feel hollow when applied to something truly terrible. Distraction can offer relief before a presentation but becomes avoidance if used to dodge a problem for weeks.

Bonanno’s earlier work on expressive flexibility showed the same pattern: people who could both enhance and suppress emotional expression on request tended to adjust better after trauma. It’s a small laboratory finding with a large implication: capacity to do both beat rigid commitment to either.

Take Wen, an illustrative composite who is a paramedic. At the scene of an accident, he clamps down on his emotions to function. Afterward, with the team and then with his partner, he lets himself talk it through. Two strategies, two contexts, one person coping well.

Now take Hal, who handles every stress by working harder. It served him in his twenties. After a layoff it fails, and he keeps doing more of the same, growing more exhausted and withdrawn. His problem isn’t a lack of coping effort. It’s a one-tool toolbox.

A word of caution about generalizing: most regulatory flexibility research relies on lab tasks and self-reports, and measures vary. The idea is well supported in broad terms, but the precise measurement is still developing.

A practical question to ask when stressed: what does this situation need, and is what I’m doing helping? If the answer is “no,” pick a different tool.

What does a rigid mind look like, and when is it a problem?

Rigidity shows up as getting stuck: repeating the same strategy that isn’t working, arguing the same point, ruminating on the same worry, insisting on one way to do things. Everyone has moments of it. It becomes a problem when it’s persistent, distressing and costly.

Look for these signs in daily life:

You get upset or panicky when plans change, even slightly. You see issues in black-and-white terms and struggle to hold a middle position. You replay the same worry or argument over and over. You keep using a method that clearly isn’t working. You find it hard to see other people’s viewpoints, or you feel that changing your mind means losing. You avoid new situations because they feel unmanageable.

Any single item is ordinary. A cluster over weeks or months, with real effects on work, sleep or relationships, deserves attention.

Cognitive rigidity features in many conditions. Rumination is a hallmark of depression. Obsessive-compulsive disorder involves rigid, repetitive thoughts and routines. Many people with autism spectrum conditions prefer sameness and find change particularly stressful, which is a difference in cognitive style, not a defect to be fixed by willpower. ADHD can involve difficulties in shifting attention and managing transitions. Anxiety disorders often involve inflexible avoidance. Eating disorders typically involve rigid rules about food and body. Acquired brain injury, stroke and some forms of dementia can impair flexibility sharply.

Imagine Dara, an illustrative composite who begins to feel that her morning routine must be performed in an exact order. Over months it grows from a comfortable habit into a ritual that takes two hours and causes panic if disrupted. She starts being late for work. That trajectory, from preference to compulsion, is a signal to talk with a doctor or therapist, not just to try harder at relaxing.

Rigidity can also be situational. Sleep loss, grief, burnout and chronic stress make nearly everyone more rigid for a while. After a bad stretch, people often notice they’ve become short-tempered about small changes, which usually eases as conditions improve.

Cultural and personality factors matter too. Preference for order and predictability isn’t pathology. Some roles and some people thrive on routine. The question isn’t “am I flexible enough?” in the abstract but “does my rigidity cost me things I care about?”

When to seek professional help: if inflexibility comes with intense distress, panic, rituals that take up significant time, sudden changes in personality or thinking, or a marked decline in functioning. A primary care doctor (a GP in the UK, Ireland, Australia and New Zealand) can rule out medical causes, and a psychologist or psychiatrist can assess for conditions such as OCD, depression or anxiety.

And treatment works. That’s worth saying twice.

Can you really train mental flexibility, and do brain games work?

You can train it, but not through the shortcuts most apps promise. Practicing a brain game makes you better at that game. Evidence that such practice improves real-world flexibility is weak, while approaches that engage the whole person show more promise.

The strongest warning comes from a major review led by Daniel J. Simons and six colleagues, published in 2016 in Psychological Science in the Public Interest. They examined the studies that brain-training companies cite as support. The result: extensive evidence that training improves performance on the trained tasks, less evidence for improvement on closely related tasks, and little evidence that training boosts distantly related tasks or everyday cognition. They also found that many studies had design flaws that limit firm conclusions.

Translation: if you spend a month on a task-switching app, you’ll get quicker at that app. Whether it helps you handle a surprise reorganization at work is, so far, unproven.

What does seem to work better? Adele Diamond and Daphne S. Ling reviewed the executive-function training literature in 2016 and concluded that narrow, computerized drills tend to yield narrow benefits. Approaches that look more promising tend to challenge executive skills while also engaging emotion, social connection, movement and enjoyment, for example some forms of physical activity, martial arts, mindfulness practices and certain classroom curricula. The authors were careful to note that the evidence is mixed and that results vary by program and population.

Several principles emerge from the literature, and they’re consistent with common sense:

Practice the real thing in varied contexts, since skills transfer best when they’re built in the situations where they’ll be used. Keep the challenge at the edge of ability: too easy builds nothing, too hard breeds frustration. Combine mental effort with meaning, social engagement and physical activity. Keep going: benefits fade without ongoing practice. And pair skill-building with attention to sleep, stress and mood, which affect flexibility directly.

Take Kai, an illustrative composite who downloads a brain-training app and plays for fifteen minutes each morning. His scores rise steadily. His boss notices no change in how he handles unexpected requests. After three months he swaps the app for improv classes and a weekly volunteer shift where every day is different. His coworkers notice a difference within weeks. That’s an anecdote, not a trial, but it matches the transfer principle.

What about claims for specific interventions? Evidence for mindfulness and exercise improving cognitive flexibility is encouraging but inconsistent, and studies are often small. Bilingualism has been proposed as a booster of flexibility, though large replication efforts have produced mixed findings. Be wary of anyone promising a guaranteed boost.

The reasonable conclusion: you can build flexibility through varied, meaningful practice, but there’s no single trick, and the biggest gains are probably in how you relate to change, not in how fast you press a button.

How do you train mental flexibility in everyday life?

Practice small, deliberate shifts in thinking, routine and response, then link them to your values. The aim isn’t to become endlessly adaptable; it’s to widen your range of options so that you have a choice when life changes the plan.

Here are seven exercises with reasonable grounding in the research described above:

1. Vary your routines on purpose. Take a different route to work, eat at an unfamiliar place, reorder your morning. Small novelty exercises the habit of adjusting.
2. Argue the other side. Pick a view you disagree with and write down the three strongest reasons someone might hold it. This builds perspective-taking and loosens black-and-white thinking.
3. Reappraise a stressor. When something goes wrong, write two alternative interpretations of what it means. It’s a core skill in cognitive behavioral therapy.
4. Practice defusion. When a harsh thought arrives, rephrase it as “I’m having the thought that…” and notice that you can have the thought without obeying it.
5. Do one thing your values ask for, uncomfortably. Choose a small step toward something that matters, such as speaking up, calling a friend or starting a hard task, even with doubt present.
6. Learn something new and hard. A language, an instrument or a sport demands constant shifting, and combines challenge with social and physical engagement.
7. Move your body and protect your sleep. Regular activity and adequate sleep support executive function, and a rested mind switches more easily.

Beyond these, mindfulness practice teaches you to notice when you’re stuck, which is the first step toward changing. Even five minutes of watching your breath and noting each time your mind wanders (and returning) is a rehearsal of shifting attention on purpose.

A useful in-the-moment habit is the pause and options move. When you notice a strong reaction to change, stop for one breath, then ask: what are two other ways I could respond? You don’t have to pick the best one. Just generating options breaks the rigid grip.

Take Imani, an illustrative composite who hates last-minute changes at work. She starts by changing her lunch spot twice a week. She practices describing her irritation as “an urge to complain” instead of “a fact about my terrible job.” When a project is rescheduled, she takes one breath, lists three options, and picks the least dramatic. None of it is dramatic. After two months, colleagues describe her as “easier to work with,” and she says the changes feel less like attacks.

Some pitfalls to avoid: don’t turn flexibility into a rule that you must always agree or adapt. Don’t push yourself into overwhelming situations, since gradual exposure works better than flooding. Don’t expect a straight line; bad days and rigid weeks are normal. And if your inflexibility is rooted in anxiety, OCD, trauma or neurodevelopmental differences, working with a therapist will usually go further than self-help alone.

Pick one exercise. Do it for a week.

What does a four-week plan for building flexibility look like?

A modest plan beats a heroic one. Spend a week on each of four themes (noticing, novelty, perspective and values), practice for about ten to fifteen minutes a day, and track what changes. Expect gradual shifts, not a transformation.

The steps below are a suggested template, not a clinically validated program. Adjust them to your life.

1. Week one: notice. Each evening, jot down one moment when you felt stuck or reacted rigidly. Note the trigger, the thought and what you did. No fixing yet; the aim is awareness.
2. Week two: add novelty. Change one routine daily, however small. Take a new path, switch seats, try a different recipe. Notice how it feels to be slightly off-balance and carry on.
3. Week three: shift perspective. Once a day, take a situation that irritated you and write two other ways of seeing it, one generous toward the other person and one that is neutral.
4. Week four: act on values. Pick one value, such as honesty or growth, and take one small action a day that fits it, noticing discomfort without letting it steer.

Measure progress in simple ways. Rate your reaction to a typical annoyance on a scale of one to ten at the start and the end. Count how often you generated alternatives in a stressful moment. Ask someone close whether they’ve noticed any difference. Subjective changes matter, since flexibility is partly about how it feels to deal with change.

Setbacks are information, not failure. Under high stress, exhaustion or illness, nearly everyone reverts to rigid habits. When that happens, go back to week one: notice, without blame. The skill of noticing is the foundation of the rest.

Consider Theo, an illustrative composite who tries the plan during a stressful month at work. In week two he skips two days. In week three, a deadline moves and he snaps at a colleague. Instead of quitting, he notes it in his evening log, apologizes the next morning, and tries the pause-and-options move the following week. By week four he can report one rescheduling he handled calmly. That isn’t a dramatic story. It’s what real progress looks like.

Think too about the wider context. Flexibility is easier when you’re rested, fed, connected and not overloaded. If your life currently leaves no slack, adding a “flexibility project” may be one more demand. Sometimes the best first step is to clear room, not to add exercises.

If after a couple of months you see little change, or if rigidity is tied to distress, rituals, panic or a significant drop in functioning, bring it to a professional. Therapies such as acceptance and commitment therapy and cognitive behavioral therapy target exactly these patterns.

Which of the four weeks do you most dread? That one’s probably where the work is.

FAQs about Mental Flexibility

What is the difference between cognitive flexibility and psychological flexibility?

Cognitive flexibility is the narrower concept: the ability to shift between tasks, rules or perspectives, usually measured with lab tasks like card sorting. Psychological flexibility is broader and comes from clinical psychology, especially acceptance and commitment therapy. It refers to staying present and open to difficult thoughts and feelings while acting in line with your values. A person can score well on one and not the other. Training that targets one, such as practicing task switching, does not necessarily improve the other, so it helps to know which kind of stuck you are. If you want a quick test of which one you’re dealing with, ask whether the stuck point is a task, a feeling or a habit.

What causes a lack of mental flexibility?

There’s rarely a single cause. Stress, poor sleep and fatigue make thinking more habitual for nearly everyone. Anxiety, depression, obsessive-compulsive disorder, eating disorders and some neurodevelopmental conditions are associated with more rigid patterns. Brain injury, stroke and dementia can impair flexibility sharply, and it tends to decline gradually with age. Temperament and learning history play a part too: people raised in unpredictable or strict environments may develop rigid coping habits. Because many of these factors are modifiable, rigidity is often more changeable than it feels. A persistent, distressing pattern is worth discussing with a doctor or therapist. Because many of these factors are modifiable, the picture is usually less fixed than it feels from the inside, and a clinician can help sort out which ones apply to you.

Can you improve mental flexibility as an adult?

Yes, though the route matters. Evidence suggests that varied, meaningful practice, including learning new skills, physical activity, mindfulness and therapies that target rigid thinking, can help. Brain-training apps reliably improve scores on the games themselves but have little evidence of broad real-world benefit, according to a large 2016 review. Progress tends to be gradual and fades without continued practice. Sleep, stress and mood affect flexibility directly, so improving those often helps as much as any exercise. Expect weeks to months for noticeable change, with setbacks along the way. Many people find it helpful to pick one life area, such as work or family, and practice there before generalizing.

Do brain training apps improve cognitive flexibility?

Mostly not beyond the app itself. A comprehensive review led by Daniel Simons found extensive evidence that people improve on the tasks they practice, less evidence of improvement on closely related tasks, and little evidence of gains on distant tasks or everyday functioning. Many of the underlying studies also had design problems. That doesn’t mean every approach to cognitive training is useless, but it does mean marketing claims often run ahead of the data. Activities that combine challenge with social, physical and emotional engagement appear more promising, though evidence is mixed. Independent replication and better control groups remain the missing pieces in this literature, so the claim is best held with modest confidence.

Is being inflexible a sign of autism or ADHD?

It can be associated with both, but it isn’t a diagnosis on its own. Many autistic people prefer predictability and find unexpected change stressful, which reflects a difference in cognitive style that deserves accommodation, not just willpower. People with ADHD often find transitions and shifting attention hard, though they may also be highly adaptable in other ways. Rigid thinking also appears in anxiety, OCD, depression and under heavy stress, so inflexibility alone can’t tell you the cause. If it’s causing significant difficulty, a psychologist or psychiatrist can assess the whole picture. Autistic adults in particular often report that predictable routines are a support, so the goal is usually accommodation and gradual skill-building, not forcing sameness out of someone’s life.

How long does it take to become more mentally flexible?

Small changes in how you react to everyday surprises can show up within a few weeks of consistent practice, especially with approaches like noticing your reactions and generating alternatives. Deeper shifts in long-standing patterns typically take months and are rarely linear. Therapy for conditions involving rigid thinking, such as acceptance and commitment therapy or cognitive behavioral therapy, often runs for several weeks to months. The rate depends on your starting point, stress levels, sleep and support. Tracking one or two specific situations, such as how you handle last-minute changes, gives a more honest sense of progress than a general feeling. A short weekly check-in with yourself, covering what you handled well and what you didn’t, makes the slow trend easier to see.

Can too much flexibility be a bad thing?

Yes. Flexibility serves your goals; it isn’t a goal in itself. Someone who changes direction at every whim, or who adapts to every demand, can lose direction and become easy to exploit. Healthy flexibility is anchored in values: you adjust your methods while staying faithful to what matters. Adapting to an abusive or unfair situation isn’t flexibility in a healthy sense, because the adaptive move may be to set a limit or leave. In the psychological flexibility literature, this is why values and committed action are part of the definition, not extras. It’s a useful corrective to the more breathless versions of the self-help message.

What exercises help with rigid thinking?

Several are worth trying. Vary routines on purpose. Argue the other side of an issue you disagree with. Write two alternative interpretations of a stressful event. Use defusion by rephrasing a harsh thought as I’m having the thought that. Take one small action in line with a value, even when uncomfortable. Learn something new and demanding, like a language or instrument. Protect sleep and move regularly. Mindfulness practice can help you notice when you’re stuck. Pick one and practice it for a week before adding another. Persistent rigidity with panic, rituals or heavy distress is worth discussing with a professional. Ordinary life supplies plenty of practice material, so there’s rarely a need to invent artificial challenges.

Bibliography

• Berg, E. A. (1948). A simple objective technique for measuring flexibility in thinking. Journal of General Psychology, 39(1), 15-22.
• Bonanno, G. A., & Burton, C. L. (2013). Regulatory flexibility: An individual differences perspective on coping and emotion regulation. Perspectives on Psychological Science, 8(6), 591-612.
• Diamond, A. (2013). Executive functions. Annual Review of Psychology, 64, 135-168.
• Diamond, A., & Ling, D. S. (2016). Conclusions about interventions, programs, and approaches for improving executive functions that appear justified and those that, despite much hype, do not. Developmental Cognitive Neuroscience, 18, 34-48.
• Hayes, S. C., Luoma, J. B., Bond, F. W., Masuda, A., & Lillis, J. (2006). Acceptance and commitment therapy: Model, processes and outcomes. Behaviour Research and Therapy, 44(1), 1-25.
• Kashdan, T. B., & Rottenberg, J. (2010). Psychological flexibility as a fundamental aspect of health. Clinical Psychology Review, 30(7), 865-878.
• Miyake, A., Friedman, N. P., Emerson, M. J., Witzki, A. H., Howerter, A., & Wager, T. D. (2000). The unity and diversity of executive functions and their contributions to complex “frontal lobe” tasks: A latent variable analysis. Cognitive Psychology, 41(1), 49-100.
• Simons, D. J., Boot, W. R., Charness, N., Gathercole, S. E., Chabris, C. F., Hambrick, D. Z., & Stine-Morrow, E. A. L. (2016). Do “brain-training” programs work? Psychological Science in the Public Interest, 17(3), 103-186.