Judgment of Line Orientation explained
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]
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. It has been suggested that 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.
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.
See also
Notes and References
- Book: Igor Grant MD. Kenneth Adams PhD. Neuropsychological Assessment of Neuropsychiatric and Neuromedical Disorders. 8 February 2009. Oxford University Press. 978-0-19-970280-0. 74.
- Book: Maura Mitrushina. Handbook of Normative Data for Neuropsychological Assessment. 10 February 2005. Oxford University Press. 978-0-19-516930-0. 284.
- Book: Andrew Steptoe. Kenneth Freedland. J. Richard Jennings . Maria M. Llabre . Stephen B Manuck . Elizabeth J. Susman. Handbook of Behavioral Medicine: Methods and Applications. 27 September 2010. Springer Science & Business Media. 978-0-387-09488-5. 127.
- Book: Martin L. Albert. Janice E. Knoefel. Clinical Neurology of Aging. 3 March 2011. Oxford University Press. 978-0-19-536929-8. 84.
- Book: Michael D. Franzen. Reliability and Validity in Neuropsychological Assessment. 31 October 2000. Springer Science & Business Media. 978-0-306-46344-0. 156.
- Book: David W. Eby. Lisa J. Molnar. Paula S. Kartje. Maintaining Safe Mobility in an Aging Society. 22 December 2008. CRC Press. 978-1-4200-6454-4. 160.
- Book: Barbara Landau. James E. Hoffman. Spatial Representation: From Gene to Mind. 18 October 2012. Oxford University Press. 978-0-19-538537-3. 80.
- Book: Sam Goldstein. Cecil R. Reynolds. Handbook of Neurodevelopmental and Genetic Disorders in Children, 2/e. 24 June 2011. Guilford Press. 978-1-60918-000-3. 328.
- Book: David Gozal. Dennis L. Molfese. Attention Deficit Hyperactivity Disorder: From Genes to Patients. 28 October 2007. Springer Science & Business Media. 978-1-59259-891-5. 169.
- Book: Margaret Semrud-Clikeman. Phyllis Anne Teeter Ellison. Child Neuropsychology: Assessment and Interventions for Neurodevelopmental Disorders, 2nd Edition. 15 June 2009. Springer. 978-0-387-88963-4. 172–.
- Book: Muriel Deutsch Lezak. Neuropsychological Assessment. 2004. Oxford University Press. 978-0-19-511121-7. 390.
