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Are two views better than one? Investigating three-quarter view facial composites

Ness, Hayley; Hancock, Peter J.B.; Bowie, Leslie; Bruce, Vicki and Pike, Graham (2015). Are two views better than one? Investigating three-quarter view facial composites. Journal of Forensic Practice, 17(4) pp. 291–306.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1108/JFP-10-2014-0040
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Abstract

Purpose – The introduction of a three-quarter-view database in the PRO-fit facial-composite system has enabled an investigation into the effects of image view in face construction. The article examines the impact of constructing full-face and three-quarter-view composites under different encoding conditions. It also examines the potential value of three-quarter-view composites that can be generated automatically from a front-view composite. We also investigate whether there is an identification benefit for presenting full-face and three-quarter composites together.
Design/methodology/approach – Three experiments examine the impact of encoding conditions on composite construction and presentation of composites at the evaluation stage.
Findings – The work revealed that while standard full-face composites perform well when all views of the face have been encoded, care should be taken when a person has only seen one view. When a witness has seen a side view of a suspect, a three-quarter-view composite should be constructed. Also, it would be beneficial for a witness to construct two composites of a suspect, one in full-face view and one in a three-quarter-view, particularly when the witness has only encoded one view. No benefit emerged for use of three-quarter-view composites generated automatically.
Research limitations/implications – This is the first study to examine viewpoint in facial composite construction. While a great deal of research has examined viewpoint dependency in face recognition tasks, composite construction is a reconstruction task involving both recall and recognition. The results indicate that there is a viewpoint effect that is similar to that described in the recognition literature. However, more research is needed in this area.
Practical implications – The practical implications of this research are that it is extremely important for facial composite operators in the field (police operators) to know who will make a good likeness of the target. Research such as this which examines real-life issues is incredibly important. This research shows that if a witness has seen all views of a perpetrator’s face then standard composite construction using a full-face view will work well. However, if they have only seen a single view then it will not.
Social implications – There are obvious wider societal implications for any research which deals with eyewitness memory and the potential identification of perpetrators.
Originality/value – No research to date has formally examined the impact of viewpoint in facial-composite construction.

Item Type: Journal Item
Copyright Holders: 2015 Emerald Group Publishing
ISSN: 2050-8794
Keywords: Viewpoint; Eyewitness memory; Facial composites; Forensic cognition; PRO-fit; Three-quarter-view
Academic Unit/School: Faculty of Arts and Social Sciences (FASS) > Psychology
Faculty of Arts and Social Sciences (FASS)
Research Group: Centre for Policing Research and Learning (CPRL)
Harm and Evidence Research Collaborative (HERC)
Item ID: 54671
Depositing User: Graham Pike
Date Deposited: 23 Apr 2018 09:44
Last Modified: 15 May 2018 15:41
URI: http://oro.open.ac.uk/id/eprint/54671
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