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Processing speed in children with clinical disorders
Author(s) -
Calhoun Susan L.,
Mayes Susan Dickerson
Publication year - 2005
Publication title -
psychology in the schools
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 75
eISSN - 1520-6807
pISSN - 0033-3085
DOI - 10.1002/pits.20067
Subject(s) - psychology , wechsler adult intelligence scale , wechsler intelligence scale for children , autism , anxiety , clinical psychology , wechsler preschool and primary scale of intelligence , intelligence quotient , developmental psychology , psychiatry , audiology , cognition , medicine
The Processing Speed Index (PSI) was first introduced on the Wechsler Intelligence Scale, Third Edition (WISC‐III; D. Wechsler, 1991), and little is known about its clinical significance. In a referred sample ( N = 980), children with neurological disorders (ADHD, autism, bipolar disorder, and LD) had mean PSI and Freedom from Distractibility Index (FDI) scores that were below the group mean IQ and lower than Verbal Comprehension (VCI) and Perceptual Organization (POI). For these groups, Coding was lower than Symbol Search. The majority of these children had learning, attention, writing, and processing speed weaknesses. This pattern was not found in the other clinical groups. For children with depression, only PSI was low. Children with anxiety disorders, oppositional‐defiant disorder, and mental retardation had no PSI weakness. PSI and POI were both low in children with traumatic brain injury and spina bifida. Implications for a revision of the WISC‐III (WISC‐IV; D. Wechsler, 2003) are discussed. © 2005 Wiley Periodicals, Inc. Psychol Schs 42: 333–343, 2005.