Journal
JOURNAL OF CLINICAL AND EXPERIMENTAL NEUROPSYCHOLOGY
Volume 33, Issue 1, Pages 101-111Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/13803395.2010.493149
Keywords
Digit span; Metrics; Computer; Aging; Education; Executive function; Attention; Verbal memory; Auditory
Categories
Funding
- Office of Research and Development, Rehabilitation R&D Service, Department of Veterans Affairs
- National Institutes of Health (NIH) [ES014038]
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [R01ES014038, R01ES019624] Funding Source: NIH RePORTER
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We measured digit span (DS) in two experiments that used computerized presentation of randomized auditory digits with performance-adapted list length adjustment. A new mean span (MS) metric of DS was developed that showed reduced variance, improved test-retest reliability, and higher correlations with the results of other neuropsychological test results when compared to traditional DS measures. The MS metric also enhanced the sensitivity of forward versus backward span comparisons, enabled the development of normative performance criteria with subdigit precision, and elucidated changes in DS performance with age and education level. Computerized stimulus delivery and improved scoring metrics significantly enhance the precision of DS assessments of short-term verbal memory.
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