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Effects of Sequential Lineup Procedure Types and Lineup Instructions on Eyewitness Identification Accuracy

Korean Journal of Social and Personality Psychology / Korean Journal of Social and Personality Psychology, (P)1229-0653;
2012, v.26 no.4, pp.141-155
https://doi.org/10.21193/kjspp.2012.26.4.009


Abstract

Eyewitness testimony often plays an important role in criminal justice system. As evidenced by some documented cases of wrongful convictions based on eyewitness identification errors, there are a serious eyewitness identification problems that need to be corrected. Eyewitness may identify a culprit through a series of identification procedures, and most research has suggested that the sequential presentation of photospread that shows a witness limeup members at a time is a better method than simultaneous presentation of photospread in which all lineup members are presented at the same time. However, sequential lineup may tend to commit more false rejection errors in culprit present condition, whereas less false identification error in culprit absent condition. The purpose of this study is to clarify false rejection in sequential lineup procedure and to identify effects of the factors on witness identification accuracy. Also, we studied the effects of lineup instruction by sequential presentation type on witness identification accuracy. In this study 180 undergraduate students participated in a 3(types of sequential lineup: immediate decision with stopping rule, immediate decision without stopping rule, final decision without stopping rule)✕2(lineup instructions: biased, unbiased)✕2(culprit: present, absent) between subject experiment. The experiment procedure is that experimenter show a subject criminal video clip and ask the subject to perform identification procedure. The results of this study present that sequential procedure in which eyewitnesses are allowed to make a final decision without stopping rule could reduce false rejection errors,while maintaining high identification accuracy. Limitations and implications of this study were discussed.

keywords
범인식별절차, 라인업, 사진제시, 목격자 식별, 식별 정확성, witness identification, lineup, photospread, identification accuracy

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Korean Journal of Social and Personality Psychology