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ISSN : 1226-9654

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Vol.32 No.1

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Application of ERP-based Memory Identification Using Bootstrap Technique for Eyewitness: Comparison of Recognition Protocol and Concealed Information Task Protocol

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2020, v.32 no.1, pp.125-136
https://doi.org/10.22172/cogbio.2020.32.1.009




& (2020). Application of ERP-based Memory Identification Using Bootstrap Technique for Eyewitness: Comparison of Recognition Protocol and Concealed Information Task Protocol. The Korean Journal of Cognitive and Biological Psychology, 32(1), 125-136, https://doi.org/10.22172/cogbio.2020.32.1.009

Abstract

Some event-related potentials (ERPs) components reflect recognition information processes. In this study, we tested the accuracy of ERP-based memory classification using peak-to-peak bootstrapped amplitude difference (BAD) method. Participants (N=25) watched a mock-crime video and performed task about 1 hour later. One group (n=13) performed recognition protocol which a response was selected from seen or unseen responses after probe presentation. The other group (n=12) performed Target/Non-target (T/NT) protocol which a response was selected from target or non-target responses based on the color of background behind the memory cue. We analyzed cue-evoked ERP and the bootstrapped differences in recollection-related ERP components (late positive complex, LPC; late posterior negativity, LPN) at Pz site were used for classification (observed vs. unobserved). Analyzing ERP differences in recognition protocol group were highly effective in distinguishing between probe and the other type of stimulus (ACC = .85). On the other hands, analyzing ERP differences in T/NT task protocol group were useless for eyewitness memory Identification (ACC = .17). These results indicate neural activity evoked by recognition cue could be used for eyewitness investigation, and suggest the property of the task is important.

keywords
eyewitness memory, event-related potentials, LPC, LPN, bootstrap, 목격자 기억, 사건관련전위, LPC, LPN, 부트스트랩

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