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Rates of Abnormally Low TOPF Word Reading Scores in Individuals Failing Versus Passing Performance Validity Testing.

Authors
  • Martin, Phillip K1
  • Schroeder, Ryan W1
  • Wyman-Chick, Kathryn A1, 2
  • Hunter, Ben P1
  • Heinrichs, Robin J1
  • Baade, Lyle E1
  • 1 1 University of Kansas School of Medicine, Wichita, KS, USA.
  • 2 2 University of Virginia School of Medicine, Charlottesville, VA, USA.
Type
Published Article
Journal
Assessment
Publication Date
Jul 01, 2018
Volume
25
Issue
5
Pages
640–652
Identifiers
DOI: 10.1177/1073191116656796
PMID: 27364003
Source
Medline
Keywords
License
Unknown

Abstract

The present study examined the impact of performance validity test (PVT) failure on the Test of Premorbid Functioning (TOPF) in a sample of 252 neuropsychological patients. Word reading performance differed significantly according to PVT failure status, and number of PVTs failed accounted for 7.4% of the variance in word reading performance, even after controlling for education. Furthermore, individuals failing ≥2 PVTs were twice as likely as individuals passing all PVTs (33% vs. 16%) to have abnormally low obtained word reading scores relative to demographically predicted scores when using a normative base rate of 10% to define abnormality. When compared with standardization study clinical groups, those failing ≥2 PVTs were twice as likely as patients with moderate to severe traumatic brain injury and as likely as patients with Alzheimer's dementia to obtain abnormally low TOPF word reading scores. Findings indicate that TOPF word reading based estimates of premorbid functioning should not be interpreted in individuals invalidating cognitive testing.

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