Abstract
The counting Stroop is a validated Stroop task variant. Initially designed as a functional magnetic resonance imaging (fMRI) task for identifying brain regions subserving cognition and attention (dorsal anterior midcingulate cortex (daMCC) and dorsolateral prefrontal cortex (DLPFC)), it has been used to study cognition in healthy volunteers and to identify functional brain abnormalities in neuropsychiatric disorders, such as attention deficit hyperactivity disorder (ADHD). During the counting Stroop, subjects report by button-press the number of words (one to four) appearing on the screen, regardless of word meaning. Neutral-word control trials contain single semantic category common animals (e.g., 'dog' written three times), while interference trials contain number words that are incongruent with the correct response (e.g., 'two' written four times). The counting Stroop can be completed in approximately 20 min per subject and can be used offline (behavioral performance) or with fMRI, positron emission tomography, event-related potentials, magnetoencephalography or intracranial recordings.
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Acknowledgements
Support for this work was provided by the Clinical Investigator Training Program of the Harvard/ MIT Division of Health Sciences and Technology-Beth Israel Deaconess Medical Center, in collaboration with Pfizer, Inc. (G.B.) and grant MH-01215 from the US National Institutes of Mental Health (S.L.R.).
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Initial task design was by G.B. All authors contributed to task refinement, validation testing and manuscript preparation.
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Bush, G., Whalen, P., Shin, L. et al. The counting Stroop: a cognitive interference task. Nat Protoc 1, 230–233 (2006). https://doi.org/10.1038/nprot.2006.35
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DOI: https://doi.org/10.1038/nprot.2006.35
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