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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 Anonymous
Trail Making Test A and B has been asserted to measure the following CONCEPTS
as measured by the contrast:

Phenotypes associated with Trail Making Test A and B


No associations have been added.


No associations have been added.


No associations have been added.

IMPLEMENTATIONS of Trail Making Test A and B
Configurable web-based test paradigm
EXTERNAL DATASETS for Trail Making Test A and B
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.

time to complete task

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).


Confirmation of a two-factor model for interpretation of the comprehensive trail making test with children.
Riccio CA, Kahn DA, Yoon M, Reynolds CR, Bonura EP
Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists (Arch Clin Neuropsychol)
2011 Apr