Abstract
The Digit Span (DS) subtest of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) is thought to be a measure of attention, concentration, sequencing, number facility, and auditory short-term memory. An optional WISC-III subtest and part of the Freedom from Distractibility (FD) factor, DS assesses several cognitive constructs, yet its utility in differential diagnosis has been questioned because poor DS or FD performance has been inconsistently associated with attention processes. In this study of 195 children referred for comprehensive neuropsychological evaluations, Digits Forward (DF) and Digits Backward (DB) component scores were found to be differentially predictive of attention, executive function, and behavior rating measures. Results suggest that DB is associated with attention and executive function processes, not the short-term rote auditory memory processes tapped by DF.
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