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Subjects must compare pairs of letters regarding exact physical identity, name identity, or categorical identity by pressing one of two response keys. These three different instructions require increasing depth of processing stimulus information which is reflected by differences in response latency.

Definition contributed by JBeringer
letter matching task has been asserted to measure the following CONCEPTS
No concepts assertions have been added.

Phenotypes associated with letter matching task


No associations have been added.


No associations have been added.


No associations have been added.

IMPLEMENTATIONS of letter matching task
Configurable web-based test paradigm with adjustable block design for blocked or mixed treatment conditions
EXTERNAL DATASETS for letter matching 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.


No indicators have yet been associated.

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).