Abstract
AbstractWhen selecting fillers to include in a police lineup, one must consider the level of similarity between the suspect and potential fillers. In order to reduce misidentifications, an innocent suspect should not stand out. Therefore, it is important that the fillers share some degree of similarity. Importantly, increasing suspect–filler similarity too much will render the task too difficult reducing correct identifications of a guilty suspect. Determining how much similarity yields optimal identification performance is the focus of the proposed study. Extant research on lineup construction has provided somewhat mixed results. In part, this is likely due to the subjective nature of similarity, which forces researchers to define similarity in relative terms. In the current study, we manipulate suspect–filler similarity via a multidimensional scaling model constructed using objective facial measurements. In doing so, we test the “propitious heterogeneity” and the diagnostic-feature-detection hypotheses which predict an advantage of lineups with low-similarity fillers in terms of discriminability. We found that filler similarity did not affect discriminability. We discuss limitations and future directions.
Funder
James S. McDonnell Foundation
Publisher
Springer Science and Business Media LLC
Subject
Cognitive Neuroscience,Experimental and Cognitive Psychology
Reference54 articles.
1. Bergold, A. N., & Heaton, P. (2018). Does filler database size influence identification accuracy? Law and Human Behavior,42, 227–243.
2. Bradski, G. (2000). The openCV library. Dr. Dobb’s Journal of Software Tools for the Professional Programmer,25(11), 120–123.
3. Busey, T. A. (1998). Physical and psychological representations of faces: Evidence from morphing. Psychological Science,9(6), 476–483.
4. Carlson, C. A., Jones, A. R., Whittington, J. E., Lockamyeir, R. F., Carlson, M. A., & Wooten, A. R. (2019). Lineup fairness: Propitious heterogeneity and the diagnostic feature-detection hypothesis. Cognitive Research: Principles and Implications,4(1), 1–16.
5. Carlson, C. A., Lockmeyer, R. F., Wooten, A. R., Jones, A. R., Carlson, M. A., & Hemby, J. A. (2023). A stronger memory for the perpetrator may attenuate effects of the identification procedure on eyewitness accuracy. Applied Cognitive Psychology,37, 419–432.