Forensic voice discrimination: The effect of speech type and background noise on performance
In forensic settings, lay (non-expert) listeners may be required to compare voice samples for identity. In two experiments we investigated the effect of background noise and variations in speaking style on performance. In each trial, participants heard two recordings, responded whether the voices belonged to the same person, and provided a confidence rating. In Experiment 1, the first recording featured read speech, while the second featured read or spontaneous speech. Both recordings were presented in quiet, or with background noise. Accuracy was highest when recordings featured the same speaking style. In Experiment 2, background noise either occurred in the first or second recording. Accuracy was higher when it occurred in the second. The overall results reveal that both speaking style and background noise can disrupt accuracy. Whilst there is a relationship between confidence and accuracy in all conditions, it is variable. The forensic implications of these findings are discussed.
"This is the pre-peer reviewed version of the following article: Forensic voice discrimination by lay listeners: The effect of speech type and background noise on performance which will be published in final form at https://doi.org/10.1002/acp.3478 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions."
Citation : Smith, H., Baguley, T., Dunn, A., Stacey, P., and Robson, J. (2018) Forensic voice discrimination: The effect of speech type and background noise on performance. Applied Cognitive Psychology,
Research Institute : Institute for Evidence-Based Law Reform (IELR)
Peer Reviewed : Yes
- Department of Law