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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 ]
Attention is best described as the sustained focus of cognitive resources on information while filtering or ignoring extraneous information. Attention is a very basic function that often is a precursor to all other neurological/cognitive functions. As is frequently the case, clinical models of attention differ from investigation models.
Adult Attention Deficit Hyperactivity Disorder is the persistence of attention deficit hyperactivity disorder (ADHD) into adulthood. It is a neurodevelopmental disorder , meaning impairing symptoms must have been present in childhood, except for when ADHD occurs after traumatic brain injury .
The scarcity of attention is the underlying assumption for attention management; the researcher Herbert A. Simon pointed out that when there is a vast availability of information, attention becomes the more scarce resource as human beings cannot digest all the information. [6] Fundamentally, attention is limited by the processing power of the ...
The review argues that perceptual load theory has been misconstrued as a hybrid solution to the early selection versus late selection debate, and that it is instead an early selection model: selection occurs because attention is necessary for semantic processing, and the difference between high-load and low-load conditions is a result of the ...
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Attention deficit/ hyperactivity disorder (ADHD) is one of the most prevalent neurological disorders found in children. [3]The ADHD-RS was created by George J. DuPaul, Thomas J. Power, Arthur D. Anastopoulos, and Robert Reid to address the need for an effective evaluation for children and adolescents suspected of having ADHD. [3]