Psychological Flexibility vs Cognitive Flexibility: Differences and Overlap

Author: Angela Bogdanova · Published: October 16, 2026 · Editorial Policy

Research cluster: Emotion Regulation & Psychological Flexibility · Written by Artificial Sapiens

Psychological flexibility and cognitive flexibility describe related ways of adapting when experience, goals, or circumstances change. Psychological flexibility concerns how a person responds to thoughts, emotions, sensations, and urges while continuing to act in ways that fit meaningful goals and situational demands. Cognitive flexibility concerns the capacity to shift mental sets, representations, rules, or perspectives as task demands change. Both belong to the broader science of adaptive behavior, but they arise from different research traditions, involve different outcome criteria, and are often measured with instruments that capture substantially different aspects of functioning.

The most revealing evidence comes from research that measured both constructs in the same participants. In a nonclinical sample of 246 younger adults, Grant and Cassidy (2022) found a meaningful association between psychological flexibility and self-reported cognitive flexibility, while task-based cognitive flexibility showed no comparable association. A broader meta-analysis of cognitive-flexibility measures similarly found almost no average relationship between self-report questionnaires and neuropsychological performance tasks in healthy adults. These findings make the choice of measurement central to any comparison. Grant & Cassidy, 2022; Howlett et al., 2021.

The essential difference

Psychological flexibility is the capacity to stay in contact with present experience, including unwanted internal experiences, and to change or persist in behavior according to what the situation permits and what matters to the person. In the acceptance and commitment therapy (ACT) tradition, the construct is described through acceptance, cognitive defusion, attention to the present moment, self-as-context, clarification of values, and committed action. A psychologically flexible response might involve pursuing a valued conversation while feeling anxious, or revising an unworkable plan without having to eliminate disappointment first. Cherry et al., 2021; Macri & Rogge, 2024.

Cognitive flexibility is the ability to adjust how information is represented, attended to, categorized, or used when task rules and environmental requirements change. Within executive-function research, it is frequently studied as set shifting or task switching, alongside working memory and inhibitory control. Someone may switch from sorting objects by color to sorting them by shape, revise a strategy after feedback, or consider a problem from another conceptual angle. Speed, errors, and the cost of switching compared with repeating a task are among the possible laboratory outcomes. Diamond, 2013; Miyake et al., 2000.

The difference becomes clearest when the same person faces two distinct demands. Rapidly changing between instructions on a computer is a cognitive-flexibility demand. Choosing to attend an important appointment while making room for uncertainty or fear is a psychological-flexibility demand. Both situations can involve attention, learning, appraisal, and changes in behavior; their success criteria are different.

Definitions and scientific origins

Psychological flexibility in contextual behavioral science

The influential ACT-derived definition emphasizes behavior that is sensitive to the present context and organized around personally meaningful values, even when difficult private experiences are present. This concept includes a person's relationship to mental events. A thought such as “I will fail” may be noticed as a thought rather than treated as an instruction. A feeling of anxiety may be accepted as part of the current experience while the person chooses an action that serves a longer-term aim.

Acceptance in this framework refers to a willingness to experience thoughts and feelings as they arise when trying to control them would undermine useful action. Cognitive defusion concerns a change in the functional influence of thoughts rather than a requirement to prove a thought false. Values provide directions for action, while committed action concerns the behavior through which those directions are pursued. These processes are related, and they need not be equally salient in every situation. Macri & Rogge, 2024.

Broader psychological research also uses the word flexibility in other traditions, including coping, personality, self-regulation, and emotional adaptation. Cherry and colleagues (2021) mapped 23 flexibility-related constructs across 220 articles and found substantial definitional overlap. The term therefore needs an explicit operational definition before two studies or scales can be compared. The ACT-derived formulation is influential, but it does not exhaust every historical use of psychological flexibility. Cherry et al., 2021.

Cognitive flexibility in executive-function research

In cognitive psychology and neuropsychology, cognitive flexibility commonly refers to switching between task sets, rules, goals, or mental representations when conditions require a change. It is often described as one component of executive functions, a family of processes that support goal-directed control. Shifting is related to inhibition and updating, and measures of one executive function can draw on several others. The latent-variable work of Miyake and colleagues (2000) established an important framework for studying both separable and shared aspects of executive functions. Miyake et al., 2000.

Cognitive flexibility is also used in broader self-report traditions to describe perceived capacity to consider alternatives, adjust beliefs, or cope with changing demands. This wider usage resembles everyday adaptive thinking and may overlap more closely with psychological flexibility than a laboratory task-switching score does. A questionnaire asking how flexibly someone usually thinks cannot be assumed to measure the same process as the extra time required to switch instructions in a timed experiment. Howlett et al., 2021.

A direct comparison across six dimensions

1. Primary question

Psychological flexibility asks how people relate to internal experiences and organize behavior around valued and workable action in context. Cognitive flexibility asks how people revise information processing, rules, or strategies when task demands change. These are complementary questions about behavior, emotion, and thought.

2. Typical challenge

Psychological flexibility is often most visible when an action is difficult because of fear, shame, frustration, uncertainty, an intrusive thought, or another uncomfortable internal event. Cognitive flexibility is typically elicited by a change in task instructions, feedback, categorization rules, relevant stimulus dimensions, or available solution paths. Emotional challenges can certainly place demands on executive control, and cognitive tasks can provoke frustration; the research procedures nevertheless target different features.

3. Criterion for success

A psychologically flexible choice is evaluated in relation to context, workable behavior, and personally meaningful directions. Persisting through discomfort may be flexible when persistence advances a valued objective, while changing direction may be flexible when circumstances render the previous plan ineffective. In a task-switching experiment, success is commonly operationalized through accuracy, response time, perseverative errors, or switching costs. Faster switching cannot by itself establish better valued action.

4. Status of distress

Distress can be a central part of the psychological-flexibility question because a person may act effectively while feeling bad. The aim is not always to decrease the intensity of the feeling. In cognitive-flexibility research, emotional experience may be unmeasured or incidental to the task. A participant can have excellent performance on a neutral switching task while experiencing difficulty approaching an emotionally important goal.

5. Common methods

Psychological flexibility is frequently assessed using questionnaires of experiential avoidance, acceptance, values-consistent behavior, or multidimensional flexibility. Cognitive flexibility is assessed using neuropsychological tests, computerized switching paradigms, and separate questionnaires of perceived flexible thinking. Each instrument samples a restricted domain of a construct, and results depend on instructions, language, scoring, population, and context. Cherry et al., 2021; Howlett et al., 2021.

6. Research tradition and application

Psychological flexibility has a strong presence in contextual behavioral science and process-oriented psychotherapy research. Cognitive flexibility is a long-standing topic in executive-function research, cognitive neuroscience, developmental psychology, and neuropsychological assessment. Both appear in studies of adaptation and mental health, but neither is a psychiatric diagnosis.

Where the constructs genuinely overlap

Adapting to changing contexts

Both constructs involve a response to changing conditions. Psychological flexibility includes recognition of the current situation and the ability to change behavior when a chosen response is no longer workable. Cognitive flexibility includes the processing changes required to shift between competing representations or task rules. The overlap lies in adaptive adjustment, not in proof that one capacity is identical to the other.

Perspective taking and alternative interpretations

Considering another interpretation of a difficult event can require cognitive flexibility. The same process may support psychologically flexible action when it makes room for useful behavior or loosens rigid adherence to a self-critical narrative. Yet someone can achieve psychological flexibility by allowing a troubling thought to remain unchanged and acting in line with values. Cognitive reinterpretation is therefore one possible route to a flexible outcome, not a universal requirement of psychological flexibility.

Regulation of attention and behavior

Shifting attention away from a distracting task rule and noticing that a thought has captured attention both involve aspects of attentional control. Their functional meanings differ. Successful performance on an executive task may be determined by speed and correctness, whereas present-moment attention within psychological flexibility matters because it can support behavior responsive to context rather than habitual avoidance.

Goal pursuit and feedback

Goal pursuit creates another point of contact. Both forms of flexibility can help when a plan needs revision. Regulatory flexibility, discussed by Bonanno and Burton (2013), focuses on sensitivity to context, a repertoire of regulatory strategies, and responsiveness to feedback. This bridges research on emotion regulation with broader adaptation, while remaining its own conceptual framework. The ability to switch mental sets may contribute to some regulatory choices, but strategy availability, motivation, environmental opportunities, and evaluation of outcomes also matter. Bonanno & Burton, 2013.

What studies directly comparing psychological and cognitive flexibility show

Grant and Cassidy: questionnaires and performance gave different answers

Grant and Cassidy (2022) investigated both constructs in 246 younger adults from a nonclinical sample. Participants completed a psychological-flexibility self-report measure and cognitive-flexibility measures that included both self-report and performance-based approaches. Cognitive flexibility as reported by participants was related to the psychological-flexibility measure, whereas task-based cognitive flexibility was not. The study reported a correlation of approximately −0.49 for the relevant self-report relationship, with an explained variance of 23.6%; the sign reflects the particular score directions used. The result should be read as a moderate association between the operationalized questionnaire scores, not as a universal relationship between abstract capacities. Grant & Cassidy, 2022.

The research illustrates a core methodological challenge. People answering questionnaires may draw on their self-concept, emotional experiences, perceived adaptability, and recent difficulties. A performance task instead captures behavior under tightly specified rules over a short period. Those methods can differ in time scale, motivation, task demands, shared response biases, and relevant contexts. The null task-based association does not establish that executive functions can never contribute to psychological flexibility. It establishes that the particular measures in that sample did not demonstrate the assumed correspondence.

The design was observational. Its sample was nonclinical and relatively young. The observed relationships do not establish whether a cognitive skill causes psychological flexibility, whether flexible psychological functioning affects responses to a cognitive questionnaire, or whether both share other explanatory factors. Larger, longitudinal, culturally diverse, and multimethod studies are needed to test proposed mechanisms and moderators.

The broader self-report versus performance problem

Howlett and colleagues (2021) systematically reviewed 21 articles on cognitive-flexibility measurement in healthy adults and performed a multilevel meta-analysis. The pooled relationship between self-report questionnaires and neuropsychological tests was about 0.05, with a 95% confidence interval from approximately −0.00 to 0.10. This offered little evidence that the two assessment approaches measured one interchangeable individual-difference trait. Howlett et al., 2021.

A separate review of clinical samples included 11 articles and 405 participants and estimated a pooled relationship around 0.01, with a 95% confidence interval of −0.16 to 0.18. That evidence likewise did not support using questionnaire and performance scores as equivalents. These reviews should inform both study design and interpretation of an individual's results, while recognizing variation across tasks, samples, and instruments. Howlett et al., 2022.

A useful explanation is that self-report describes how people perceive their usual behavior across circumstances, whereas laboratory tasks sample performance in a restricted setting. Other explanations include measurement error, the mixture of executive abilities required by complex tasks, differences in reliability, and the possibility that questionnaires and behavioral tests partly assess different constructs. The evidence supports careful separation of methods more strongly than any single explanation of the discrepancy.

Conceptual reviews support both similarity and distinction

The scoping review by Cherry and colleagues (2021) found shared definitional elements across prominent flexibility constructs, including response to interference or distress, behavioral action, and meeting goals or values. It also documented wide variation in terminology and psychometrics. Conceptual overlap is therefore established at the level of some descriptions, while empirical equivalence of scales or mechanisms requires direct testing. Cherry et al., 2021.

How each construct is measured

Psychological-flexibility questionnaires

The Acceptance and Action Questionnaire–II (AAQ-II) was developed to measure experiential avoidance and psychological inflexibility. It became widely used in ACT-related research. Its popularity should be read alongside concerns about discriminant validity: questionnaire responses can overlap substantially with general psychological distress, and a high score may reflect distress as well as the proposed inflexibility process. Bond and colleagues (2011) provided the original psychometric study; Wolgast (2014) and Tyndall and colleagues (2019) investigated the extent of construct overlap. Bond et al., 2011; Wolgast, 2014; Tyndall et al., 2019.

The Personalized Psychological Flexibility Index (PPFI) measures flexibility in relation to a personally meaningful goal and addresses acceptance, avoidance, and the use of difficult feelings in goal pursuit. It offers a different operationalization from the AAQ-II. Kashdan and colleagues (2020) used a multimethod approach in its development. Cherry and colleagues (2021) highlighted its promise among reviewed measures, while emphasizing that broader conceptual consensus and validation remain important. A promising scale still requires appropriate population norms, valid interpretation, and attention to the particular purpose for which it was designed. Kashdan et al., 2020; Cherry et al., 2021.

Multidimensional measures also separate acceptance, defusion, awareness, values-related action, and related processes rather than reducing everything to one global score. Evidence from 67 unique ACT studies synthesized by Macri and Rogge (2024) showed that measures of flexibility and inflexibility can change during interventions and that such changes relate to distress outcomes. That finding supports the relevance of the processes, while heterogeneity and study design limit strong causal conclusions about every component. Clinical treatment efficacy is a separate question from construct validity. Macri & Rogge, 2024.

Cognitive-flexibility tasks

Task-switching experiments typically compare repeated trials with trials requiring a new stimulus-response mapping or rule. Researchers may calculate a switch cost in reaction time or errors. The Wisconsin Card Sorting Test examines responses to changing categorization principles and feedback; Trail Making Test Part B includes alternating between number and letter sequences. Other paradigms test shifts in attention, dimensional sorting, or learned response rules. Each procedure recruits several component skills, such as processing speed, working memory, inhibition, sustained attention, and comprehension of instructions. Diamond, 2013; Miyake et al., 2000.

Task performance is influenced by education, language familiarity, test conditions, age, health, motivation, and practice effects. A switching cost is a property of a particular task under particular conditions, and even strong test reliability does not automatically establish what a result means for complex daily-life functioning.

Cognitive-flexibility questionnaires

Cognitive-flexibility questionnaires commonly ask whether a person can consider alternatives, adapt a perspective, or approach difficult situations from different angles. Their scores may reflect perceived adaptability, confidence, perceived control, or difficulties in daily life. They may be more strongly related to psychological-flexibility questionnaires because both depend on the respondent's reflections about behavior and experiences. Such correlations are informative, but shared method variance can inflate apparent convergence. Grant & Cassidy, 2022; Howlett et al., 2021.

What a test score can and cannot show

No single AAQ-II, PPFI, cognitive-flexibility questionnaire, Trail Making Test, or card-sorting score diagnoses psychological inflexibility as a disease, establishes a mental disorder, or reveals a person's capacity in every context. Researchers can use validated measures to answer bounded questions. Clinical interpretation requires a qualified assessment of symptoms, medical and developmental factors, context, functioning, and the psychometric properties of the instrument. A comparison of scores from different tests without a shared validated framework is especially vulnerable to error.

Psychological flexibility, cognitive flexibility, and emotion regulation

Emotion regulation concerns processes that influence emotional experience, expression, or behavior. Psychological flexibility often involves an adaptive relationship to emotions and thoughts, but it is not synonymous with reducing emotional intensity. Acceptance may leave distress present while increasing freedom to choose a behavior. Cognitive flexibility may help with reappraisal or the selection of alternative strategies, although emotion regulation can also draw on habits, social support, environmental modification, or problem solving.

Regulatory flexibility specifically concerns whether regulation fits contextual demands. Bonanno and Burton's framework distinguishes sensitivity to a situation, access to a varied strategy repertoire, and willingness to revise strategy use after feedback. A person may be capable of switching rules quickly on a screen while having a narrow repertoire of ways to manage interpersonal conflict. Another person may use context-sensitive regulation effectively even if their performance on a particular timed cognitive task is average. Bonanno & Burton, 2013.

This separation prevents three common conceptual errors: calling every strategy switch psychological flexibility, equating experiential acceptance with cognitive speed, and treating difficulty regulating emotion as proof of impaired executive function. These are distinct empirical hypotheses requiring measures of the processes actually claimed.

Everyday examples that distinguish the two

A presentation while anxious

A person feels anxious before a presentation. They notice the anxiety, choose to speak because the topic matters, and remain willing to feel uncertainty without abandoning the task. This illustrates a psychologically flexible pattern. Cognitive flexibility could also be involved if the speaker adapts examples to the audience or changes the order of the presentation. The two processes can occur together without being the same process.

A rule changes during a task

A participant is asked to classify shapes by color and then immediately by size. The speed and accuracy of shifting rule sets illustrate cognitive-flexibility performance. The participant's acceptance of frustration or willingness to persist toward a meaningful goal is a different dimension that the classification task may not assess.

Changing a plan after feedback

Someone planned to finish a difficult project alone, but new information shows collaboration would produce a better result. Revising the work plan demonstrates an adaptive change in strategy. Cognitive flexibility may support finding the alternative, regulatory flexibility may support responding to feedback, and psychological flexibility may support accepting disappointment while taking the more useful action. Which construct is being studied depends on the observations and outcome measures.

A recurring self-critical thought

A person repeatedly thinks, “I'm incapable.” They might generate a more balanced interpretation, which involves cognitive change. They might instead recognize the statement as a passing mental event, permit it to occur, and continue practicing a valued skill. The latter illustrates defusion and values-consistent action. Both can be useful depending on context; successful psychological flexibility does not require a person to win an argument against each unwanted thought.

Can strong cognitive flexibility compensate for psychological inflexibility?

A person may perform well on rule switching yet avoid difficult interpersonal experiences, become entangled in self-critical thoughts, or abandon meaningful activities when distressed. Good laboratory performance therefore does not guarantee psychological flexibility in personally important situations. Conversely, someone may behave consistently with values while experiencing slower task switching, fatigue, or cognitive load. Available research supports separating these characteristics rather than inferring either one from the other.

The phrase “compensate for” also suggests a mechanism that has not been established universally. Cognitive skills may facilitate some adaptive choices, but values, motivation, social context, learning history, emotional experiences, opportunities for action, and mental-health status all shape outcomes. Direct longitudinal and intervention studies would be needed to test when one process helps another.

Does increasing cognitive flexibility increase psychological flexibility?

Current evidence does not establish an automatic causal transfer from task-switching improvement to psychological flexibility in everyday life. A gain on a practiced task could reflect learning its rules, speeding responses, or improving a narrow component of executive control. Broader improvements require direct measurement of untrained behavior and meaningful outcomes. In task-switching training research, improvements on the trained skill have sometimes occurred without comparable far-transfer benefits for other executive functions or general intelligence. Diamond, 2013.

Likewise, changes in psychological-flexibility questionnaires during ACT-derived interventions cannot be interpreted as proof of improved performance on executive-function tests. The 2024 meta-analytic evidence on flexibility-related processes is valuable for understanding candidate treatment mechanisms, but intervention effects, symptom improvements, and neural or executive-function explanations are analytically distinct. Macri & Rogge, 2024.

A more productive research question is which components of cognitive control, under which emotional and motivational circumstances, support a person's ability to pursue values or select adaptive regulatory responses. Such hypotheses require multimethod designs, reliable tasks, behavioral indicators of valued action, and repeated observations across contexts.

Practical ways to observe and support flexibility

For psychological flexibility, observation can begin with identifying a valued direction and noticing when efforts to eliminate internal discomfort interrupt progress toward it. A person might practice naming a difficult thought, recognizing its influence on action, making room for an uncomfortable feeling, and choosing a small behavior connected to an important goal. These are educational examples of the construct, not a standardized treatment plan or a guarantee of symptom reduction.

For cognitive flexibility, examples include learning a new rule, deliberately comparing alternative explanations, revising a problem-solving strategy after feedback, and practicing transitions between different task demands. Such activities may develop familiarity and task-specific abilities, but claims about improvements in general executive functioning or mental health require intervention evidence beyond subjective impressions or repeated practice scores.

Context matters for both constructs. Fatigue, prolonged stress, uncertainty, limited resources, and competing demands may alter a person's responses. Someone who switches efficiently under quiet conditions may struggle in a noisy environment; someone who willingly experiences ordinary anxiety may need a different form of support during a crisis. It is more informative to ask what the situation demands and what outcome matters than to apply one permanent label to an individual.

When anxiety, low mood, intrusive experiences, trauma-related symptoms, or cognitive difficulties cause substantial persistent impairment, an individualized assessment can determine which symptoms, environmental factors, and clinical approaches are relevant. This comparison article explains constructs and does not establish indications for ACT, DBT, neuropsychological rehabilitation, or other treatments. A psychiatric diagnosis is determined by the appropriate clinical criteria and assessment, not by either flexibility score.

Limitations and unanswered scientific questions

The two literatures use different frameworks, tasks, and time scales. A psychologically flexible action may depend on what a person values, which may be difficult to capture with a standardized task. Cognitive-flexibility tests can be optimized for repeatability but may remove the social, emotional, and motivational information that gives everyday adaptation its meaning. Neither method has automatic priority across every research question.

Comparisons are also influenced by measurement overlap and construct contamination. A questionnaire about psychological inflexibility may correlate with current distress because its items capture distress-related language or because inflexibility and distress are genuinely associated. A questionnaire about cognitive flexibility may correlate with another questionnaire partly because both draw on the same self-evaluative process. Statistical associations must be interpreted with attention to how questions are worded and how outcomes are measured. Wolgast, 2014; Tyndall et al., 2019.

Much of the direct comparison evidence is cross-sectional, and a single nonclinical study cannot establish population-wide relations or causality. Research across age groups, cultures, neurodevelopmental profiles, and clinical contexts remains important. Ecologically informative studies can combine validated questionnaires, laboratory performance, real-life behavior, and repeated within-person sampling while keeping their distinct interpretations visible. Such work can establish which abilities converge, when they diverge, and which forms of flexibility matter for particular outcomes.

Frequently asked questions

Are psychological flexibility and cognitive flexibility the same thing?

They refer to overlapping but distinct constructs. Psychological flexibility primarily concerns how people respond to internal experiences and pursue meaningful action in context. Cognitive flexibility concerns shifting cognitive rules, perspectives, or strategies when demands change. The extent of empirical overlap depends substantially on how the two are measured. Cherry et al., 2021.

Can someone be cognitively flexible but psychologically inflexible?

Yes, the conceptual frameworks permit this combination. A person can perform efficiently on a rule-switching task yet struggle to act toward valued goals in the presence of anxiety or self-critical thoughts. Direct evidence cautions against treating cognitive task scores as substitutes for psychological-flexibility measures. Grant & Cassidy, 2022.

Does psychological flexibility require changing a thought?

No. Psychological flexibility may involve changing a response or perspective, but acceptance and cognitive defusion can support valued action while the original thought remains present. The importance of an action is judged by its fit with goals and circumstances, rather than by whether a thought has disappeared.

Does cognitive flexibility always mean fast thinking?

No. Speed is one outcome in many experimental tasks, but flexibility also involves accuracy, updating rules appropriately, and selecting a workable response to new demands. A fast response that follows the wrong rule is not successful switching. Broader uses of the term also refer to perceived adaptability and alternative perspectives.

Which test is best for measuring flexibility?

The question and target construct determine the choice. AAQ-II, PPFI, and multidimensional flexibility scales address different psychological processes and have different validity considerations. Neuropsychological switching tasks and cognitive-flexibility questionnaires supply different types of cognitive evidence. A measure must be selected and interpreted for its validated purpose. Cherry et al., 2021; Howlett et al., 2021.

Is low flexibility a diagnosis?

No. Neither psychological inflexibility nor low cognitive flexibility is a standalone psychiatric diagnosis. Both may be studied as processes, performances, or reported difficulties. The clinical significance of a difficulty depends on context, persistence, impairment, other symptoms, and appropriately qualified evaluation.

Can psychological flexibility improve without improving executive-function test results?

The two outcomes are different and can be measured separately. Evidence from ACT-related studies shows changes in psychological-flexibility measures, while direct evidence does not require parallel improvements on task-switching tests. To claim improvement in both, a study would need to measure both and demonstrate the relevant effects. Macri & Rogge, 2024; Grant & Cassidy, 2022.

What the evidence supports

There is conceptual overlap in adaptation, attention, alternative responses, and context-sensitive action. The strongest distinction is that psychological flexibility is organized around one's relationship to internal experience and meaningful behavior, whereas cognitive flexibility is organized around shifting cognitive processing and rules in response to demands. Direct evidence shows that questionnaire-based overlap cannot be assumed to extend to task-based executive performance. Measurement is therefore part of the scientific conclusion, not a technical afterthought. Grant & Cassidy, 2022; Howlett et al., 2021.

Current reviews support the importance of psychological-flexibility processes in research on emotional and behavioral adjustment, while also documenting variation in definitions, measurement quality, and causal evidence. For cognitive flexibility, executive-function research supports the importance of adapting rules and mental sets, yet different test families often provide distinct information. The scientific task is to specify the process, situation, measure, and outcome whenever the term flexibility is used. Cherry et al., 2021; Diamond, 2013.

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Acceptance and Commitment Therapy for Anxiety: Evidence, Uses, and Limits — Disorder-specific evidence on a therapy designed in part around psychological flexibility.

Psychological Flexibility: Definition, Processes, and Evidence — Explains the construct of psychological flexibility, its relation to changing circumstances and valued action, and the evidence from contextual behavioral science.

Psychological Inflexibility: Meaning, Patterns, and Mental Health — Explores rigid patterns of responding to thoughts and feelings, the role of experiential avoidance, and the limitations of current measures.

Experiential Avoidance: Meaning, Examples, and Psychological Costs — Distinguishes short-term protective avoidance from persistent avoidance that constrains meaningful activities and psychological adjustment.

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References

Bond, F. W., Hayes, S. C., Baer, R. A., Carpenter, K. M., Guenole, N., Orcutt, H. K., Waltz, T., & Zettle, R. D. (2011). Preliminary psychometric properties of the Acceptance and Action Questionnaire–II: A revised measure of psychological inflexibility and experiential avoidance. Behavior Therapy, 42(4), 676–688. https://doi.org/10.1016/j.beth.2011.03.007

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. https://doi.org/10.1177/1745691613504116

Cherry, K. M., Vander Hoeven, E., Patterson, T. S., & Lumley, M. N. (2021). Defining and measuring psychological flexibility: A narrative scoping review of diverse flexibility and rigidity constructs and perspectives. Clinical Psychology Review, 84, 101973. https://doi.org/10.1016/j.cpr.2021.101973

Diamond, A. (2013). Executive functions. Annual Review of Psychology, 64, 135–168. https://doi.org/10.1146/annurev-psych-113011-143750

Grant, A., & Cassidy, S. (2022). Exploring the relationship between psychological flexibility and self-report and task-based measures of cognitive flexibility. Journal of Contextual Behavioral Science, 23, 144–150. https://doi.org/10.1016/j.jcbs.2021.12.006

Howlett, C. A., Wewege, M. A., Berryman, C., Oldach, A., Jennings, E., Moore, E., et al. (2021). Same room—different windows? A systematic review and meta-analysis of the relationship between self-report and neuropsychological tests of cognitive flexibility in healthy adults. Clinical Psychology Review, 88, 102061. https://doi.org/10.1016/j.cpr.2021.102061

Howlett, C. A., Wewege, M. A., Berryman, C., Oldach, A., Jennings, E., Moore, E., et al. (2022). Back to the drawing board—The relationship between self-report and neuropsychological tests of cognitive flexibility in clinical cohorts: A systematic review and meta-analysis. Neuropsychology, 36(5), 347–372. https://doi.org/10.1037/neu0000796

Kashdan, T. B., Disabato, D. J., Goodman, F. R., Doorley, J. D., & McKnight, P. E. (2020). Understanding psychological flexibility: A multimethod exploration of pursuing valued goals despite the presence of distress. Psychological Assessment, 32(9), 829–850. https://doi.org/10.1037/pas0000834

Macri, J. A., & Rogge, R. D. (2024). Examining domains of psychological flexibility and inflexibility as treatment mechanisms in acceptance and commitment therapy: A comprehensive systematic and meta-analytic review. Clinical Psychology Review, 110, 102432. https://doi.org/10.1016/j.cpr.2024.102432

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. https://doi.org/10.1006/cogp.1999.0734

Tyndall, I., Waldeck, D., Pancani, L., Whelan, R., Roche, B., & Dawson, D. L. (2019). The Acceptance and Action Questionnaire–II as a measure of experiential avoidance: Concerns over discriminant validity. Journal of Contextual Behavioral Science, 12, 278–284. https://doi.org/10.1016/j.jcbs.2018.09.005

Wolgast, M. (2014). What does the Acceptance and Action Questionnaire (AAQ-II) really measure? Behavior Therapy, 45(6), 831–839. https://doi.org/10.1016/j.beth.2014.07.002