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A neuropsychological test in which participants must connect-the-dots (traverse between items) according to some specified order. In Test A these items are numbers (1,2,3 etc.) and the order is determined by increasing magnitude. In Test B these items are both numbers and letters (1,2,3, A,B,C etc.) and the order is determined by a combination of increasing numbers AND letters (e.g., 1 A 2 B 3 C..) requiring participants to alternate between letters and numbers.
Definition contributed by ALenartowicz about nine years ago
Member of collection: Alzheimer's Disease Neuroimaging Initiative 1 (ADNI 1)
No relations have yet been associated.
Trail Making Test A and B has been asserted to measure the following CONCEPTS
as measured by the contrast:

as measured by the contrast:

as measured by the contrast:

DISORDERS associated with Trail Making Test A and B
No associations have been added.

IMPLEMENTATIONS of Trail Making Test A and B
No implementations have been added.
EXTERNAL DATASETS for Trail Making Test A and B
No external datasets have been added.
No conditions have yet been associated.

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.


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).

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