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a collaborative knowledge base characterizing the state of current thought in Cognitive Science.
a task that requires the reordering of an initially unordered set of letters and numbers


letter-number sequencing

Definition contributed by Anonymous
Phenotypes associated with letter number sequencing


No associations have been added.


No associations have been added.


No associations have been added.

IMPLEMENTATIONS of letter number sequencing
No implementations have been added.
EXTERNAL DATASETS for letter number sequencing
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.

length of sequence
number of correct items

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).


Criterion validity of new WAIS-II subtest scores after traumatic brain injury.
Donders J, Tulsky DS, Zhu J
(J Int Neuropsychol Soc)
2001 Nov

Modeling Working Memory Tasks on the Item Level.
Luo D, Chen G, Zen F, Murray B
Intelligence (Intelligence)
2010 Jan 1