Patterns of Cognitive Test Scores and Symptom Complaints in Persons with TBI Who Failed Performance Validity Testing

Mark Sherer, Angelle M. Sander, Jennie Ponsford, Leia Vos, Julia M.P. Poritz, Esther Ngan, Luis Leon Novelo

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


To determine clinically meaningful subgroups of persons with traumatic brain injury (TBI) who have failed performance validity testing.Method: Study participants were selected from a cohort of 674 participants with definitive medical evidence of TBI. Participants were those who failed performance validity testing (the Word Memory Test, using the standard cutoffs). Participants were administered cognitive tests and self-report questionnaires. Test and questionnaire results were summarized as 12 dimension scores. Cluster analysis using the k-means method was performed.Results: Cluster analysis for the 143 retained participants indicated three subgroups. These subgroups differed on patterns of scores. Subgroup 1 was impaired for memory and had no excessive complaints. Subgroup 2 had impaired memory and processing speed as well as concern regarding cognition function. Subgroup 3 showed impairment on all cognitive tests and excess complaints in multiple areas.Conclusions: These results provide a preliminary basis for improved understanding of poor performance validity.

Original languageEnglish (US)
Pages (from-to)932-938
Number of pages7
JournalJournal of the International Neuropsychological Society
Issue number9
StatePublished - Oct 1 2020
Externally publishedYes


  • Cognitive tests
  • Performance validity
  • Self-report questionnaires
  • Subgroups
  • Traumatic brain injury

ASJC Scopus subject areas

  • General Neuroscience
  • Clinical Psychology
  • Clinical Neurology
  • Psychiatry and Mental health


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