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ERIC Number: EJ823880
Record Type: Journal
Publication Date: 2008-Dec
Pages: 8
Abstractor: As Provided
Reference Count: 40
ISSN: ISSN-1040-3590
Validation of the Child Premorbid Intelligence Estimate Method to Predict Premorbid Wechsler Intelligence Scale for Children-Fourth Edition Full Scale IQ among Children with Brain Injury
Schoenberg, Mike R.; Lange, Rael T.; Saklofske, Donald H.; Suarez, Mariann; Brickell, Tracey A.
Psychological Assessment, v20 n4 p377-384 Dec 2008
Determination of neuropsychological impairment involves contrasting obtained performances with a comparison standard, which is often an estimate of premorbid IQ. M. R. Schoenberg, R. T. Lange, T. A. Brickell, and D. H. Saklofske (2007) proposed the Child Premorbid Intelligence Estimate (CPIE) to predict premorbid Full Scale IQ (FSIQ) using the Wechsler Intelligence Scale for Children-4th Edition (WISC-IV; Wechsler, 2003). The CPIE includes 12 algorithms to predict FSIQ, 1 using demographic variables and 11 algorithms combining WISC-IV subtest raw scores with demographic variables. The CPIE was applied to a sample of children with acquired traumatic brain injury (TBI sample; n = 40) and a healthy demographically matched sample (n = 40). Paired-samples t tests found estimated premorbid FSIQ differed from obtained FSIQ when applied to the TBI sample (ps [less than or equal to] 0.01). When applied to healthy peers, estimated and obtained FSIQ did not differ (ps greater than 0.02). The demographic only algorithm performed well at a group level, but estimates were restricted in range. Algorithms combining single subtest scores with demographics performed adequately. Results support the clinical application of the CPIE algorithms. However, limitations to estimating individual premorbid ability, including statistical and developmental factors, must be considered. (Contains 3 tables and 1 footnote.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Wechsler Intelligence Scale for Children