Judgment of Line Orientation

Judgment of Line Orientation (JLO) is a standardized test of visuospatial skills commonly associated with functioning of the parietal lobe in the right hemisphere. The test measures a person's ability to match the angle and orientation of lines in space. Subjects are asked to match two angled lines to a set of 11 lines that are arranged in a semicircle and separated 18 degrees from each other. The complete test has 30 items, but short forms have also been created. There is normative data available for ages 7-96.

Judgment of Line Orientation
Test ofParietal lobe

In 1994, Arthur L. Benton developed the test from his study of the effects of a right hemisphere lesion on spatial skills.

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