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Korean Journal of Social and Personality Psychology

ISSN : 1229-0653

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Vol.25 No.4

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Verbal Overshadowing Effect and the Benefits of Eye-closure in Audio Line-up

Korean Journal of Social and Personality Psychology / Korean Journal of Social and Personality Psychology, (P)1229-0653;
2011, v.25 no.4, pp.77-92
https://doi.org/10.21193/kjspp.2011.25.4.005


& (2011). Verbal Overshadowing Effect and the Benefits of Eye-closure in Audio Line-up. Korean Journal of Social and Personality Psychology, 25(4), 77-92, https://doi.org/10.21193/kjspp.2011.25.4.005

Abstract

If a witness heard just an offender’s voice, the witness would identify the offender’s voice in audio line-up. But before the audio line-up, earwitnesses are usually asked to verbally describe the offender’s voice. Verbal description of offender’s voice bears risk to the verbal overshadowing effect(VOE) which reduces identification accuracy because of the disparity of perceptual modality of two tasks(verbal description and retrieval). In this study, three hypotheses were tested. The first hypothesis was that although the target voice and the foils were made of different contents in audio line-up, verbally describing the offender’s voice might induce the VOE. The second hypothesis was that eye-closure instruction would make the accuracy rate of identification higher. The third hypothesis was that eye-closure instruction to earwitness in audio line-up could make him/her overcome VOE. In our experiment participants saw a mock robbery crime scene in a video clip. Then they performed different tasks(verbal description, control) and audio line-up in different conditions(eye-closure, control). Results were that verbal description didn’t induce VOE contrary to our expectation, and that eye-closure group was more accurate in identifying the offender’s voice than control group. But it was not clear whether or not eye-closure instruction made earwitnesses overcome VOE. Future research directions are discussed.

keywords
언어장막효과, 눈감기 효과, 목소리 목격자, 음성식별절차, 수사, verbal overshadowing effect, eye-closure effect, earwitness, audio line-up, investigation

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