For significantly more children with ADHD (87%), the score for FDI plus the Processing Speed Index was less than the sum of the two remaining Index scores (VCI+POI). The four lowest mean subtest scores for the ADHD group were Digit Span, Arithmetic, Coding, and Symbol Search, which was not the case for the nonADHD group.
Further, the discrepancy between FSIQ and FDI was significantly greater in the ADHD group. Mean FSIQ (Full Scale IQ) exceeded FDI (Freedom from Distractibility Index) at all ages from 6 to 16 years in the ADHD group but not in the nonADHD group. N2 - WISC-III data were analyzed in clinical samples of 87 children with ADHD and 32 children without ADHD. T1 - WISC-III freedom from distractibility as a measure of attention in children with and without Attention Deficit Hyperactivity Disorder An independent replication study involving 52 referred children with ADHD and 23 without ADHD supported these findings.", The presence of mood, behavior, or learning disorders affected scores in some cases. No children without ADHD had Digit Span and Arithmetic as two of their three lowest subtest scores, whereas this was found for 23% of children with ADHD. An independent replication study involving 52 referred children with ADHD and 23 without ADHD supported these findings.Ībstract = "WISC-III data were analyzed in clinical samples of 87 children with ADHD and 32 children without ADHD.
All rights reserved.WISC-III data were analyzed in clinical samples of 87 children with ADHD and 32 children without ADHD. Digit span backward becomes a valid measure of working memory at exactly the point that testing is traditionally discontinued.Ĭopyright © 2017 Elsevier Ltd. Minor test modifications may address test validity concerns, and should be considered in future test revisions. Alternate administration/scoring of digit span backward significantly improved its associations with working memory reordering (r=.58), working memory dual-processing (r=.53), working memory updating (r=.28), and KTEA-2 achievement (r=.49).Ĭonsistent with prior work, these findings urge caution when interpreting digit span performance. Traditional digit span backward scores failed to predict working memory or KTEA-2 achievement (allns). Traditional and modified scores were compared to a battery of criterion working memory (construct validity) and academic achievement tests (predictive validity) for 34 children with ADHD ages 8-13 (M=10.41 11 girls). WISC-IV digit span was modified to administer all trials (i.e., ignore discontinue rule) and count digits rather than trials correct. The current study pilot-tested minor administration/scoring modifications to improve digit span backward's construct and predictive validities in a well-characterized sample of children with ADHD. Pediatric ADHD is associated with impairments in working memory, but these deficits often go undetected when using clinic-based tests such as digit span backward.
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