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A task in which multiple (typically two) stimuli are presented simultaneously and the subject must select the stimulus that matches the currently relevant rule. The relevant rule alternates or "shifts" among multiple (typically two) rules. The rule represents the relevant task "dimension". The stimulus-response mappings are unique and constant within each possible rule dimension.

Definition contributed by Anonymous
Phenotypes associated with extradimensional shift task


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IMPLEMENTATIONS of extradimensional shift task
No implementations have been added.
EXTERNAL DATASETS for extradimensional shift task
No implementations have been added.

Experimental conditions are the subsets of an experiment that define the relevant experimental manipulation.


You must specify conditions before you can define contrasts.

In the Cognitive Atlas, we define a contrast as any function over experimental conditions. The simplest contrast is the indicator value for a specific condition; more complex contrasts include linear or nonlinear functions of the indicator across different experimental conditions.

number of patterns identified
number of trials taken to correctly identify new pattern

An indicator is a specific quantitative or qualitative variable that is recorded for analysis. These may include behavioral variables (such as response time, accuracy, or other measures of performance) or physiological variables (including genetics, psychophysiology, or brain imaging data).


Behavioural measures of frontal lobe function in a population of young social drinkers with binge drinking pattern.
Scaife JC, Duka T
Pharmacology, biochemistry, and behavior (Pharmacol Biochem Behav)
2009 Sep

Cognitive inflexibility and frontal-cortical activation in pediatric obsessive-compulsive disorder.
Britton JC, Rauch SL, Rosso IM, Killgore WD, Price LM, Ragan J, Chosak A, Hezel DM, Pine DS, Leibenluft E, Pauls DL, Jenike MA, Stewart SE
Journal of the American Academy of Child and Adolescent Psychiatry (J Am Acad Child Adolesc Psychiatry)
2010 Sep

Motor inhibition and cognitive flexibility in obsessive-compulsive disorder and trichotillomania.
Chamberlain SR, Fineberg NA, Blackwell AD, Robbins TW, Sahakian BJ
The American journal of psychiatry (Am J Psychiatry)
2006 Jul