#Digit span psychology definition serial#
Mixed/dys MCI patients scored lower than non-MCI patients for serial position 3 (p < 0.003) serial position 4 (p < 0.002) and lower than both group for serial position 5 (recency p < 0.002). Follow-up analyses found attenuation of the recency effect for mixed/dys MCI patients. Serial order position accuracy, transposition errors, perseverations, and omission errors were tallied.Ī 3 (group)×5 (serial position) repeated measures ANOVA yielded a significant group×trial interaction. Serial order/WM ability was assessed by asking participants to repeat 7 trials of five digits backwards. Memory clinic patients (n = 66) were classified into three groups: single domain amnestic MCI (aMCI), combined mixed domain/dysexecutive MCI (mixed/dys MCI), and non-MCI where patients did not meet criteria for MCI. The current research tallied primacy/recency effects, out-of-sequence transposition errors, perseverations, and omissions to assess WM deficits in patients with mild cognitive impairment (MCI). In prior dementia research using the Backward Digit Span Test (BDT), only aggregate test performance was examined. Working memory (WM) is often assessed with serial order tests such as repeating digits backward. 10 Department of Neurology, Boston University School of Medicine, Boston, MA, USA.9 University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA.8 Department of Neurology, Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA.7 Department of Psychiatry, University of California, San Diego, San Diego, CA, USA.6 VA San Diego Healthcare System, San Diego, CA, USA.5 Department of Psychology, University of Southern California, Los Angeles, CA, USA.4 Vanderbilt Memory and Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA.3 Department of Clinical and Health Psychology, University of Florida, Gainesville, FL, USA.2 Department of Behavioral Sciences and the Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA.1 Departments of Geriatrics, Gerontology and Psychology, New Jersey Institute for Successful Aging, Rowan University-School of Osteopathic Medicine, Stratford, NJ, USA.
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