Examiner: 'Now I am going to say some numbers, but this time when I stop I want you say them backwards. Administer both spans of the same length regardless of how the participant performs. Finally, we offer suggestions for improvement to achieve higher levels of Digit Span subscale score reliability.ĭigit span backward digit span forward digit span sequencing memory reliability. Index Scores: Primary interpretation level VCI & PRI: 3 core subtests each WMI & PSI: 2 core subtests each GAI VCI + PRI. Say the digits at a rate of 1 digit about every 1 sec. of backward digit span, interpretation is normally based on the combined raw score of forward digit span and backward digit span to derive the scaled score. Instead, interpretations should probably be restricted to the Digit Span Forward, Digit Span Backward, and Digit Span Sequencing test scores. In light of the results, clinicians are cautioned against interpreting Digit Span subscale scores. Based on omega hierarchical, we estimated the internal consistency reliability associated with the Digit Span subscale scores at. Next, we simulated item-level Digit Span subscale data to correspond very closely to the Wechsler Adult Intelligence Scale-fourth edition normative sample. With accessible examples, we demonstrate that stratified coefficient alpha can deviate substantially from a model-based internal consistency reliability that represents an underlying dimension, that is, omega hierarchical. The digits forward (DF) and backward (DB) tasks, as in the WAIS-III Digit Span subtest (Wechsler, 1997), are widely used in neuropsychological research and.
93, based on a coefficient known as stratified coefficient alpha. particular, digit span tasks, comprised of forward and backward tasks, have been used extensively to examine working memory capacity in IWA (Friedmann. The Digit Span subscale (Digit Span Forward, Backward, and Sequencing combined composite) internal inconsistency reliability has been reported at. According to interpretation, age differences should be minimal in verbal forward digit span while they should be more important in backward verbal digit.
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