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