College of Psychology: Faculty Proceedings, Presentations, Speeches and Lectures

Title

Premorbid Memory Prediction Using the Wechsler Test of Adult Reading

Event Location / Date(s)

New York, NY / October 21-25, 2008

Document Type

Conference Proceeding

Presentation Date

10-21-2008

Conference Name / Publication Title

28th Annual Meeting of the National Academy of Neuropsychology

Description

Abstract

Objective: The Wechsler Test of Adult Reading predicts WMS-III Memory Indexes using a combination of reading vocabulary and demographic information. This study validatedWTAR premorbid memory estimates in a sample of 100 TBI patients with mild (n = 32), moderate (n = 16), or severe (n = 52) injuries.

Data selection: Patients completed the WTAR and WMS-III an average of 1.5 (mild), 2.8 (moderate), or 3.2 (severe) years postinjury. They received $50 for participation, were not seeking compensation for injuries, and showed valid performances on the Word Memory Test.

Data synthesis: Mild TBI patients obtained Immediate (M= 93.2) and General (M= 95.8) Indexes that did not differ significantly from WTAR premorbid estimates (96.9 and 98.1, respectively). Moderate patients showed significant estimated declines of 14.8 and 13.3 points in obtained Immediate (M= 79.4) and General (M= 81.9) Indexes. Severe injuries produced estimated residual reductions of 20.9 and 20.5 points in Immediate (M= 71.4) and General (M= 72.9) Memory. Length of unconsciousness significantly predicted extent of estimated Immediate (r = 0.35) and General (r = 0.38) memory decline in the aggregate sample. Premorbid Immediate (r = 0.08) and General (r = 0.09) memory scores were not significantly related to length of unconsciousness.

Conclusions: Results are consistent with studies that show an absence of memory impairment after recovery from MHI but significant impairment after more severe TBI. A combination of demographic information and word reading predictors attenuates the sensitivity of premorbid estimates to injury severity or cognitive impairment.

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