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A task in which subjects are asked to perform a simple mathematical verification (e.g., 4/2 +1 = 3) and then read a word, with a recall test following some number of those verify/read pairs. The maximum number of words that can be recalled is the "operation span".



Definition contributed by Anonymous
Phenotypes associated with operation span task


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IMPLEMENTATIONS of operation span task
Implementation of automated OSPAN and several other working memory tasks, for E-Prime, MEL, and Inquisit.
EXTERNAL DATASETS for operation span task
No implementations have been added.

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


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 or percentage of words remembered

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).


The reliability and stability of the Turner and Engle working memory task.
Klein K, Fiss WH
(Behav Res Methods Instrum Comput)
1999 Aug

An automated version of the operation span task.
Unsworth N, Heitz RP, Schrock JC, Engle RW
(Behav Res Methods)
2005 Aug