P300 correlates of simulated malingered amnesia in a matching-to-sample task: Topographic analyses of deception versus truthtelling responses

Joel P Rosenfeld, Antoinette M. Reinhart, Maneesha Bhatt, Joel Ellwanger, Keith Gora, Matthew Sekera, Jerry Sweet

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Two experiments using a P300-enhanced Forced Choice Procedure (P3FCP) investigated simulated amnesia in a matching-to-sample task. In Experiment 1, successful manipulation of subjects towards different behavioral hit rates (75-80% vs. 85-90%) did not adversely affect the diagnostic sensitivity of match-mismatch Pz-P300 amplitude analyses, allowing detection of 69% of simulators. P300 amplitudes of simulators (Malinger group) were as large as those of truth-tellers (truth group, a control), indicating no dual task-related (Malingering) reduction across different behavioral hit rates. Experiment 2 found no main effect of oddball type, match vs. mismatch, on P300 (P3) amplitude with a mismatch-rare variant of the P3FCP. This study also revealed larger Pz-P3s in the Malingering (vs. Truth-telling) condition. Subsequent topographic analyses suggested different Truth and Malinger scaled P3 amplitude topographies in both these sets of P3FCP data and in those from a previous autobiographical memory paradigm. Further analysis yielded preliminary evidence for a common deception-related P3 amplitude topography across different paradigms/conditions.

Original languageEnglish (US)
Pages (from-to)233-247
Number of pages15
JournalInternational Journal of Psychophysiology
Volume28
Issue number3
DOIs
StatePublished - May 1 1998

Keywords

  • Event-related potential
  • Malingered amnesia
  • P300
  • Scalp topography analysis

ASJC Scopus subject areas

  • Behavioral Neuroscience

Fingerprint Dive into the research topics of 'P300 correlates of simulated malingered amnesia in a matching-to-sample task: Topographic analyses of deception versus truthtelling responses'. Together they form a unique fingerprint.

Cite this