Nback Test(n-back test)

The n-back task is commonly used as an assessment in cognitive neuroscience to measure a part of working memory and working memory capacity. The n-back was introduced by Wayne Kirchner in 1958.


There are two main hypotheses for this weak correlation between the n-back task and other working memory assessments. One proposal is that the n-back task assesses different "sub-components" of working memory than do other assessments.


A more critical explanation is that rather than primarily assessing working memory, performance on the n-back task depends on "familiarity- and recognition-based discrimination processes," whereas valid assessments of working memory demand "active recall."


The test consists of two boards with pegs and several beads with different colors. The examiner (usually a clinical psychologist or a neuropsychologist) uses the beads and the boards to present the examinee with problem-solving tasks.


Whatever the cause of the performance differences between the n-back and other assessments of working memory, some researchers stress the need for further exploration of the construct validity of the n-back task.


This test will take about 20 minutes to complete.

Recommended minimum screen resolution is 1000 x 700.

Single Test

5 .00

One Time Run

Set of 10

40 .00

Small Project

Set of 100

250 .00

Medium Size Project


500 .00

Any Number of Participants

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