D2 Test of Attention | |
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![]() d2 Test | |
Purpose | measure of selective and sustained attention |
The d2 Test of Attention is a neuropsychological measure of selective and sustained attention and visual scanning speed. [1] It is a paper and pencil test that asks participants to cross out any letter "d" with two marks around above it or below it in any order. [2] The surrounding distractors are usually similar to the target stimulus, for example a "p" with two marks or a "d" with one or three marks. [3] The original version of the test was created by Brickenkamp (1981) in Germany as a cancellation task. [4] A meta-analysis, published in Personality and Individual Differences , found that adults have shown increasing scores in selective attention over the past three decades, as measured by the d2 Test of Attention. [5]