NDLI: Attempts to Suppress Episodic Memories Fail but do Produce Demand: Evidence from the P300-Based Complex Trial Protocol and an Implicit Memory Test

Content Provider	Springer Nature Link
Author	Ward, Anne C. Rosenfeld, J. Peter
Copyright Year	2017
Abstract	Instructions to voluntarily suppress memories of a mock crime have been reported to result in decreased P300 amplitude during a P300-based concealed information test (CIT) and reduced autobiographical Implicit Association Test (aIAT) D scores, supporting successful suppression. However, one such study, (Hu et al., Psychological science 26(7):1098–1106, 2015) used the P300-based Complex Trial Protocol with a 50–50 target to nontarget ratio, which could impose much response switching and thereby drain cognitive resources, also resulting in reduced P300. The present study replicated Hu et al. (Psychological science 26(7):1098–1106, 2015) with one major variation—a less intrusive 20–80 target to nontarget ratio that required less response switching. Detection rates were high using both the brainwave-based CIT (90% accuracy) and the aIAT (87% accuracy). However we found no significant differences between the suppression and simple guilty groups on the major indices of concealed information detection, which compare probe and irrelevant P300 responses. While we did find that overall P300 amplitude was reduced in the suppression group, this reduction was not specific to probe responses. Additionally, while there were group differences in aIAT hit rates, there were no differences in aIAT D scores. Taken together, these findings suggest that the previously demonstrated reductions in P300 are a reflection of task demand rather than of effective voluntary memory suppression.
Starting Page	13
Ending Page	26
Page Count	14
File Format	PDF
ISSN	10900586
Journal	Applied Psychophysiology and Biofeedback
Volume Number	42
Issue Number	1
e-ISSN	15733270
Language	English
Publisher	Springer US
Publisher Date	2017-01-30
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Memory suppression P300 Concealed information test Psychology Health Psychology Public Health Psychotherapy and Counseling
Content Type	Text
Resource Type	Article
Subject	Neuropsychology and Physiological Psychology Applied Psychology

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