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Woodcock-Johnson III Test of Cognitive Abilities
Please visit this website for more information about the instrument: Woodcock-Johnson
Supplemental: Multiple Sclerosis (MS), Neuromuscular Disease (NMD), Sport-Related Concussion (SRC) Subacute (after 72 hours to 3 months) and Persistent/Chronic (3 months and greater post concussion), and Traumatic Brain Injury (TBI)
Exploratory: Myalgic encephalomyelitis/Chronic fatigue syndrome (ME/CFS)
Short Description of Instrument
The WJ III NU Tests of Cognitive Abilities is a comprehensive, individually administered cognitive assessment that identifies strengths and weaknesses in cognitive abilities, processes, and academic performance to assist professionals in the diagnosis of disabilities or noncognitive factors.
The WJ III NU Tests of Cognitive Abilities Standard Battery consists of 10 tests and contains 6 clusters. The Extended Battery includes 10 additional tests, and contains 14 clusters. Depending on the purpose and extent of the assessment, examiners can use the Standard Battery alone or in conjunction with the Extended Battery. Further extensions may be gained by though the use of the Diagnostic Supplement.
Professionals use the WJ III NU Tests of Cognitive Abilities to:
Measure basic psychological processes
Diagnose learning disabilities
Plan individual educational programs across a variety of settings
Determine ability discrepancies
Conduct research
Sport-Related Concussion-Specific: There is now a Woodcock-Johnson, 4th edition. No published studies were identified that used this measure in sport concussion; however, subtests are cited online as part of clinical batteries used in this population.
Age Range: 2–90
Measures general and specific cognitive functions. The test clusters are grouped into three cognitive areas, Verbal Ability, Thinking Ability, and Cognitive Efficiency. it can determine specific strengths and weaknesses, and can help associate certain factors on future development.
ME/CFS Population: is mostly given to children and adolescents or adults with developmental disorders. It is often used with the WJ III cognitive abilities to determine intellectual and academic strength and weaknesses.
Comments/Special Instructions
Reliability: The median reliability coefficient alphas for all age groups for the standard battery of the WJ III COG for tests 1 through 10 ranged from .81 to .94.  For the Extended battery, median coefficients ranged from .74 to .97. The reliability scores for the WJ III meet or exceed standards.  The median cluster reliabilities are mostly .90 or higher, and the individual test reliabilities are mostly .80 or higher, and can be used for decision making purposes with support from other sources.
Validity: The technical manual presents a considerable amount of evidence supporting the validity of scores from the test, noting that the earlier versions of the battery have also been shown to have validity. Test content on the WJ III COG has emerged from previous versions, is similar to the content found on other well-established cognitive measures, or is based on sound experimental instruments.
The normative samples (pre-school, school aged, college and adult) were selected to be representative of the US population, based on geographic distribution, community size and type, and SES, occupational status, sex, race.
Schrank FA. Woodcock-Johnson III Tests of Cognitive Abilities. In Davis AS (Ed.). Handbook of Pediatric Neuropsychology. New York: Springer, 2010, pp. 415-434.


Document last updated March 2018
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