Voice parade procedures: optimising witness performance

Smith, H. ORCID: 0000-0003-2712-5527, Bird, K., Roeser, J. ORCID: 0000-0002-4463-0923, Robson, J. ORCID: 0000-0002-7649-2457, Braber, N. ORCID: 0000-0003-2611-1190, Wright, D. and Stacey, P.C. ORCID: 0000-0002-6018-8979, 2019. Voice parade procedures: optimising witness performance. Memory. ISSN 0965-8211

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Abstract

Unfamiliar voice identification is error-prone. Whilst the investigation of system variables may indicate ways of boosting earwitness performance, this is an under-researched area. Two experiments were conducted to investigate how methods of presenting voices during a parade affect accuracy and self-rated confidence. In each experiment participants listened to a target voice, and were later asked to identify that voice from a nine-person target present or target absent parade. In Experiment 1, accuracy did not vary across parades comprising 15 or 30 s sample durations. Overall, when the target was present, participants correctly identified the target voice with 39% accuracy. However, when the target was absent, participants correctly rejected the parade 6% of the time. There was no relationship between accuracy and confidence. In Experiment 2, performance with a serial procedure, in which participants responded after hearing all nine voices, was compared with a sequential procedure, in which participants made a decision after listening to each voice. Overall accuracy was higher with the sequential procedure. These results highlight the importance of system variable research in voice identification. Different methods of presenting voices have the potential to support higher levels of accuracy than the procedure currently recommended in England and Wales.

Item Type: Journal article
Publication Title: Memory
Creators: Smith, H., Bird, K., Roeser, J., Robson, J., Braber, N., Wright, D. and Stacey, P.C.
Publisher: Routledge
Date: 8 October 2019
ISSN: 0965-8211
Identifiers:
NumberType
10.1080/09658211.2019.1673427DOI
1119174Other
Divisions: Schools > Nottingham Law School
Schools > School of Arts and Humanities
Schools > School of Social Sciences
Depositing User: Jonathan Gallacher
Date Added: 24 Sep 2019 08:48
Last Modified: 10 Oct 2019 10:55
URI: http://irep.ntu.ac.uk/id/eprint/37747

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