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.[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]

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