Which of the following is a test of selective and sustained visual attention?

Question

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The d2 test is a measure of selective and sustained visual attention. It involves scanning a page of randomly arranged letters and crossing out all instances of the letter "d" with two marks. This requires selective attention to focus on the target letter and sustained attention to maintain the task for a prolonged period of time. The other options (COWA, GOAT, GCS) are not tests of visual attention.

Which of the Following Is a Test of Selective and Sustained