In 2000, Akira Miyake and colleagues published a landmark study in Cognitive Psychology that established something counterintuitive about the mind’s higher-order control functions. Using confirmatory factor analysis across a battery of executive function tasks, they demonstrated that the abilities popularly bundled together as executive function were not a single capacity but three separable ones: updating, the ability to revise the contents of working memory; inhibition, the ability to suppress prepotent responses; and shifting — what the broader literature calls cognitive flexibility — the ability to move between mental sets, revise established models, and approach a problem from a structurally different angle than the one currently active.

The three functions correlated with each other, confirming they were related. They also remained statistically distinguishable, confirming they were separate. Cognitive flexibility — the shifting function — turned out to be specifically predictive of performance under novel conditions, including conditions that require model revision, perspective change, and the ability to abandon a framework that is no longer working. It is distinct from general intelligence, which predicts performance under conditions where the established approach is correct. It is distinct from openness to experience, which is a personality dimension. And it is distinct from creativity, which involves generative production. Cognitive flexibility is the specific function that determines how well a person revises their operating model when the conditions have changed and the current model no longer fits.

What determines cognitive flexibility at any given moment

Adele Diamond’s synthesis of executive function developmental research established the specific neurological basis and the specific vulnerabilities. Cognitive flexibility depends on prefrontal cortex function, specifically the dorsolateral prefrontal cortex and the anterior cingulate, which jointly manage the shifting and error-monitoring functions that flexibility requires. These regions are among the most metabolically demanding in the brain and specifically vulnerable to the cortisol elevation that stress produces.

Amy Arnsten’s research on prefrontal function under stress documents the mechanism: cortisol and catecholamine elevation under acute stress reduces the signal-to-noise ratio in prefrontal circuits, impairing the precise inhibitory and shifting functions that executive control requires. The brain does not lose cognitive capacity uniformly under stress. It loses prefrontal-dependent capacity specifically, while subcortical systems — faster, more automated, more schema-driven — become relatively dominant. The practical consequence is that performance on tasks requiring cognitive flexibility degrades under precisely the conditions that most professional and entrepreneurial contexts generate: time pressure, uncertainty, interpersonal conflict, and high stakes.

Sleep deprivation produces a functionally identical pattern through a different route. The prefrontal cortex is disproportionately affected by sleep restriction, with measurable impairments in shifting and updating functions occurring after a single night of reduced sleep, often without the person’s awareness that their cognitive flexibility has degraded. Subjective confidence in one’s thinking quality does not track the actual impairment.

Why it predicts performance so strongly

Most professional and entrepreneurial performance contexts are characterised by two features that make cognitive flexibility specifically predictive. The first is structural novelty: market conditions change, customer needs evolve, competitive dynamics shift, and the strategy or product that worked last quarter may not work next quarter. Performance under these conditions requires the ability to revise the operating model rather than applying the existing one more forcefully. The second is the need to hold multiple frameworks simultaneously: to understand a customer’s perspective while holding one’s own, to evaluate a competitor’s strategy on its own terms while assessing it against one’s own, to consider a decision from multiple stakeholder perspectives without collapsing them into a single view.

General intelligence predicts performance well when the problem is well-defined and the applicable framework is established. When the problem requires identifying which framework applies, or constructing a new one, the shifting function becomes the binding constraint. This is why cognitive flexibility is a stronger predictor of entrepreneurial performance specifically than general intelligence: the entrepreneurial environment maximises the conditions under which model revision and framework shifting are required, and minimises the conditions under which applying an established framework well is sufficient.

The entrenchment that expertise produces

Erik Dane’s cognitive entrenchment research established the most commercially important caveat. Deep expertise in a domain installs deep schemas — richly developed interpretive frameworks that enable rapid accurate processing within the domain’s established problem space. These schemas are cognitive assets when the problem space is stable. They become liabilities when the problem space changes, because the depth of the schema is proportional to the resistance it creates to the framework revision that cognitive flexibility enables.

The cognitive flexibility required to recognise that a domain’s fundamental assumptions no longer hold, and to approach the domain’s problems from a structurally different starting point, is precisely what deep domain expertise makes harder. The most experienced person in the room has the most developed domain schemas and therefore, in conditions of genuine structural change, may be the least cognitively flexible about the domain’s core assumptions. This is not a failure of intelligence or motivation. It is the schema depth that constitutes their expertise simultaneously constraining the shifting function that the changed conditions require.

What develops it

David Epstein’s Range research, covering the developmental outcomes of breadth of experience across structurally different domains, identified the mechanism through which cognitive flexibility is built. Each time a person operates in a domain with a different structure, a different logic, and different implicit assumptions from the one they know well, they are practicing the shifting function: constructing a new framework, revising the previous one, and moving between incompatible perspectives. The breadth of the experience is not merely informational. It is the developmental mechanism of the flexibility itself.

The bilingual research provides the sharpest confirmation of this principle. People who operate fluently in two languages, and who must continuously shift between two linguistic frameworks that impose different structures on experience, show measurably higher cognitive flexibility than monolinguals across tasks that have nothing to do with language. The practice of shifting between incompatible frameworks generalises to the shifting function broadly, which is what the Miyake model predicts: shifting is a general executive capacity, and practicing it in one domain builds it in others.

The aerobic exercise research provides the most accessible development mechanism that does not require cross-domain engagement. John Ratey’s Spark synthesis and the subsequent exercise neuroscience research confirmed that regular aerobic exercise produces measurable improvements in prefrontal cortex function through the BDNF mechanism — brain-derived neurotrophic factor, which supports the growth and maintenance of neural connections in prefrontal regions. The improvements are specific to prefrontal-dependent functions, which include cognitive flexibility. The effect is not large relative to the effects of sustained cross-domain experience, but it is consistent, begins to appear within weeks, and requires nothing beyond the exercise itself.

Britta Hölzel and colleagues’ mindfulness research identified a third mechanism. Regular mindfulness meditation produces measurable changes in the prefrontal structures underlying executive control and in the regulation of the default mode network — the network active during self-referential and ruminative processing that competes with the controlled processing cognitive flexibility requires. The specific improvement in the ability to disengage from an established perspective and redirect attention toward a new one is the shifting function developing through practice.

The conditions that impair it most

The commercially most important finding from the cognitive flexibility research is the one Diamond’s synthesis makes explicit: cognitive flexibility is most needed exactly when the conditions most reliably impair it. The pivot decision — where the current business model has failed to achieve the traction the entrepreneur projected, and a fundamental revision of the model is required — demands maximum cognitive flexibility. The pivot decision is also made under the conditions of stress, sleep deprivation, and high stakes that Diamond’s research predicts will maximally degrade the prefrontal function that cognitive flexibility depends on.

The entrepreneur making the pivot decision under crisis conditions is not simply facing a difficult strategic question. They are facing a difficult strategic question with a cognitively impaired tool for addressing it — and the impairment is invisible from the inside, because subjective confidence in one’s thinking does not degrade proportionally with the actual function. This is the structural problem that understanding cognitive flexibility is meant to address: the value of the capacity is greatest in the conditions that most reliably reduce it, which is the clearest possible argument for building it during the stable periods when it can be built, and for managing the conditions that impair it so that it is available when the conditions become unstable.

If the dynamics described here are significantly affecting your wellbeing, speaking with a psychologist is the right next step. UK: Samaritans (116 123, free, 24/7). Mind (0300 123 3393). BACP: bacp.co.uk/search/Therapists. Crisis Text Line — text HOME to 741741 (US, UK, Canada, Ireland). International: internationaltherapistdirectory.com.

This article is for educational and informational purposes only. Sources: Miyake, A., Friedman, N.P., Emerson, M.J., Witzki, A.H. & Howerter, A. (2000), The Unity and Diversity of Executive Functions and Their Contributions to Complex Frontal Lobe Tasks, Cognitive Psychology, 41(1), 49-100. Diamond, A. (2013), Executive Functions, Annual Review of Psychology, 64, 135-168. Arnsten, A.F.T. (1998), The Biology of Being Frazzled, Science, 280(5370), 1711-1712. Dane, E. (2010), Reconsidering the Trade-off Between Expertise and Flexibility, Academy of Management Review, 35(4), 579-603. Epstein, D. (2019), Range, Riverhead Books. Ratey, J.J. (2008), Spark, Little, Brown. Hölzel, B.K. et al. (2011), Mindfulness Practice Leads to Increases in Regional Brain Gray Matter Density, Psychiatry Research: Neuroimaging, 191(1), 36-43. Cheng, C. (2001), Assessing Coping Flexibility in Real-Life and Laboratory Settings, Journal of Personality and Social Psychology, 80(5), 814-833. Mlodinow, L. (2018), Elastic: Flexible Thinking in a Time of Change, Pantheon Books. Dehaene, S. (2020), How We Learn, Viking.