Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-26T21:25:42.523Z Has data issue: false hasContentIssue false
  • English
  • Français

Using word recognition tests to estimate premorbid IQ in early dementia: Longitudinal data

Published online by Cambridge University Press:  01 November 1997

GLENN E. SMITH ,
DARYL L. BOHAC ,
ROBERT J. IVNIK  and
JAMES F. MALEC
GLENN E. SMITH
Affiliation:
Psychology Division, Mayo Clinic, Rochester, MN
DARYL L. BOHAC
Affiliation:
Psychology Division, Mayo Clinic, Rochester, MN
ROBERT J. IVNIK
Affiliation:
Psychology Division, Mayo Clinic, Rochester, MN
JAMES F. MALEC
Affiliation:
Psychology Division, Mayo Clinic, Rochester, MN
Get access Rights & Permissions [Opens in a new window]

Abstract

This study examined the utility of word recognition scores for estimating actual Verbal IQ scores obtained from 1–5 years earlier. Participants were 271 persons remaining normal and 24 initially normal persons who developed cognitive impairment over longitudinal follow-up. A previously published regression equation based on education and the American modification of the National Adult Reading Test (Nelson, 1982) was used to estimate Mayo Verbal IQ. In spite of correlating well with prior obtained scores (r = .7) the predicted score tended to overestimate the obtained Mayo Verbal IQ. A revised equation was developed in the normal sample, which improved accuracy of prediction. Among the 24 persons who developed cognitive impairment over a 5-year span, the revised predicted scores provided reasonable estimates of initial Mayo Verbal IQ. To aid in clinical interpretation, a table of the normal frequencies of predicted Mayo Verbal IQ minus contemporaneously obtained Mayo Verbal IQ is provided. (JINS, 1997, 3, 528–533.)

Keywords

Dementia; Premorbid IQ; Word recognition
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 3 , Issue 6 , November 1997 , pp. 528 - 533
Copyright
© 1997 The International Neuropsychological Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)