Matrix graphic labeling items contain a grid in which the labels are in rows, and the column headers are letters. Matrix graphic labeling items include an image with letters corresponding to the column headers. Online users click or touch radio buttons at the intersections of rows and columns to indicate the label for each letter.
Matrix graphic labeling items are accessible with audio presentation and switch responses. Matrix items can be presented in paper-and-pencil and braille test forms because there are no moving parts. Optical scan answer sheets can be used for matrix items because radio button response options can be shown as answer bubbles.
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