Judgment of Line Orientation
| Judgment of Line Orientation | |
|---|---|
| Diagnostics |
Judgment of Line Orientation (JLO) is a standardized test of visuospatial skills commonly associated with functioning of the parietal lobe in the right hemisphere.[1] The test measures a person's ability to match the angle and orientation of lines in space.[2] 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.[3] The complete test has 30 items, but short forms have also been created. There is normative data available for ages 7-96.[4]
In 1994, Arthur L. Benton developed the test from his study of the effects of a right hemisphere lesion on spatial skills.[5]
Contents
Clinical performances
In a study measuring JLO scores and on-road performance, JLO was correlated with better backing-up scores.[6]
Neurological disorders
Patients with the following disorders often fail the JLO test:
Patients with dementia often perform poorly on this test. However, patients with Parkinson's disease perform poorly because of the complexity of task demands, not due to visuospatial deficits.[9]
Psychiatric disorders
Studies performed on people with schizophrenia found no deficit in performance.[2]
Procedure
The test consists of five practice trials followed by 30 test items.[10] It is suitable for adult and pediatric populations. The test has two forms, H and J, which present the same 30 trials but in different order.[11] Responses to prompts can be pointed to or spoken.
Scoring
A score of 17 or less is considered a sign of severe deficit.[11]
See also
References
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