Résumé
Cognitive flexibility is an intrinsic property of a cognitive system often associated with the mental ability to adjust its activity and content, switch between different task rules and corresponding behavioral responses, maintain multiple concepts simultaneously and shift internal attention between them. The term cognitive flexibility is traditionally used to refer to one of the executive functions. In this sense, it can be seen as neural underpinnings of adaptive and flexible behavior. Most flexibility tests were developed under this assumption several decades ago. Nowadays, cognitive flexibility can also be referred to as a set of properties of the brain that facilitate flexible yet relevant switching between functional brain states. Cognitive flexibility varies during the lifespan of an individual. In addition, certain conditions such as obsessive–compulsive disorder are associated with reduced cognitive flexibility. Since cognitive flexibility is a vital component of learning, deficits in this area might have other implications. Two common approaches to studying of cognitive flexibility focus on the unconscious capacity for task switching and conscious ability of cognitive shifting. Methods of measuring cognitive flexibility include the A-not-B task, the Dimensional Change Card Sorting Task, the Multiple Classification Card Sorting Task, the Wisconsin Card Sorting Task, and the Stroop Test. Functional Magnetic Resonance Imaging (fMRI) research has shown that specific brain regions are activated when a person engages in cognitive flexibility tasks. These regions include the prefrontal cortex (PFC), basal ganglia, anterior cingulate cortex (ACC), and posterior parietal cortex (PPC). Studies conducted with people of various ages and with particular deficits have further informed how cognitive flexibility develops and changes within the brain. The American Psychological Association (APA) defines cognitive flexibility as: The capacity for objective appraisal and appropriately flexible action.
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