TY - JOUR
T1 - P300 correlates of simulated malingered amnesia in a matching-to-sample task
T2 - Topographic analyses of deception versus truthtelling responses
AU - Peter Rosenfeld, J.
AU - Reinhart, Antoinette M.
AU - Bhatt, Maneesha
AU - Ellwanger, Joel
AU - Gora, Keith
AU - Sekera, Matthew
AU - Sweet, Jerry
PY - 1998/5/1
Y1 - 1998/5/1
N2 - 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.
AB - 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.
KW - Event-related potential
KW - Malingered amnesia
KW - P300
KW - Scalp topography analysis
UR - http://www.scopus.com/inward/record.url?scp=0032079947&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032079947&partnerID=8YFLogxK
U2 - 10.1016/S0167-8760(97)00084-6
DO - 10.1016/S0167-8760(97)00084-6
M3 - Article
C2 - 9545659
AN - SCOPUS:0032079947
VL - 28
SP - 233
EP - 247
JO - International Journal of Psychophysiology
JF - International Journal of Psychophysiology
SN - 0167-8760
IS - 3
ER -