Related Experiment Video
Updated: Jan 25, 2026
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How to Obtain Reliable Visual Event-related Potentials in Newborns
Published on: October 24, 2019
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An intra-individual approach for detecting evaluation with event-related potentials
David R Herring1, John J B Allen2, Yvette M Güereca3
1Department of Psychology, Murray State University, United States of America.
Summary
This study explored using late positive potentials (LPPs) to detect concealed evaluations. While LPPs detected true evaluations well, they were less accurate when participants concealed their responses.
Area of Science:
- Cognitive Neuroscience
- Psychophysiology
- Forensic Psychology
Background:
- The P3-based concealed information test (CIT) accurately detects non-evaluative memories.
- The accuracy of P3-like late positive potentials (LPPs) for detecting evaluative memories is less established.
- Indirect measures of memory and evaluation are crucial in forensic and cognitive science.
Purpose of the Study:
- To investigate the efficacy of LPPs in discriminating concealed evaluative memories.
- To assess the accuracy of an LPP-based evaluative oddball paradigm for detecting deception.
- To explore the impact of cognitive load during concealment on LPPs.
Main Methods:
- An LPP-based evaluative oddball paradigm was employed.
- Participants truthfully reported evaluations or concealed them for pictorial stimuli.
- An intra-individual Bayesian scheme was used to classify response congruence.
- LPPs were analyzed in relation to evaluative congruence and reporting condition.
Main Results:
- LPPs were significantly larger for evaluatively incongruent compared to congruent pictures.
- This LPP effect diminished during concealed responses, suggesting increased cognitive load.
- Sensitivity for detecting evaluations was 80% during truth-telling but only 35% during concealment.
Conclusions:
- LPP-based measures show potential for detecting individual evaluations.
- Current methods demonstrate poor accuracy in assessing concealed evaluations.
- Further research is needed to improve the detection of concealed evaluative information.
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