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Diverse types of expertise in facial recognition
Abstract
Facial recognition errors can jeopardize national security, criminal justice, public safety and civil rights. Here, we compare the most accurate humans and facial recognition technology in a detailed lab-based evaluation and international proficiency test for forensic scientists involving 27 forensic departments from 14 countries. We find striking cognitive and perceptual diversity between naturally skilled super-recognizers, trained forensic examiners and deep neural networks, despite them achieving equivalent accuracy. Clear differences emerged in super-recognizers’ and forensic examiners’ perceptual processing, errors, and response patterns: super-recognizers were fast, biased to respond ‘same person’ and misidentified people with extreme confidence, whereas forensic examiners were slow, unbiased and strategically avoided misidentification errors. Further, these human experts and deep neural networks disagreed on the similarity of faces, pointing to differences in their representations of faces. Our findings therefore reveal multiple types of facial recognition expertise, with each type lending itself to particular facial recognition roles in operational settings. Finally, we show that harnessing the diversity between individual experts provides a robust method of maximizing facial recognition accuracy. This can be achieved either via collaboration between experts in forensic laboratories, or most promisingly, by statistical fusion of match scores provided by different types of expert.
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Forensic facial examiners tend to be more balanced in placement of decision-making criterion between matches and mismatches and are more cautious in expressing confidence when errors are made.
“Forensic facial examiners, on the other hand, are practitioners with a trained ability for face identification and tend to be more balanced in the placement of the decision-making criterion between matches and mismatches.These experts are also more cautious in expressing confidence when errors are made (Towler et al., 2023).”
From A criterion-placement theory of face matching (2026) · cites this paper as Towler et al., 2023
Super-recognizers exhibit a tendency to classify face pairs as matches and are biased to make highly confident errors on mismatch trials.
“These observers exhibit a tendency to classify face pairs as matches and are biased to make highly confident errors on mismatch trials (Towler et al., 2023).”
From A criterion-placement theory of face matching (2026) · cites this paper as Towler et al., 2023
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“The idea that expertise in face identification is homogeneous across different human observers is prevalent in psychological study of face recognition 35 , and consistent with broader concepts of convergent evolution 36 and Ideal Observer Theory 37 .”
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Self-citationDo professional facial image comparison training courses work?
Towler, A., Kemp, R. I., Burton, A. M., Dunn, J. D., Wayne, T., Moreton, R., & White, D. (2019) · PLOS ONE · doi:10.1371/journal.pone.0211037 · Cited by 111
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A criterion-placement theory of face matching
Baker, K. A., Mondloch, C. J., Hancock, P. J. B., & Bindemann, M. (2026) · Cognition · doi:10.1016/j.cognition.2025.106319 · Cited by 5
Metadata
- Authors
- Towler, A., Dunn, J. D., Castro Martínez, S., Moreton, R., Eklöf, F., Ruifrok, A., Kemp, R. I., & White, D.
- Venue
- Scientific Reports
- Published
- 2023-07-14
- Volume
- 13
- Issue
- 1
- ISSN
- 2045-2322
- PMC
- PMC10349110
- Cited by
- 30
- References
- 8
- Language
- en
- Funders
- ARC Linkage Project (LP160101523)
- ARC DECRA (DE210100357)
- ARC Discovery Project (DP190100957)
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