Evidence map›Paper›PMID 33210257›Full record

ArticleCognitive research: principles and implications2020

Surgical face masks impair human face matching performance for familiar and unfamiliar faces.

Daniel J Carragher, Peter J B Hancock

Abstract read
In one paragraph

Article in Cognitive research: principles and implications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

85 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Time Pressure Increases Automation Reliance in a Face Matching Task.Quarterly journal of experimental psychology (2006) · 2026
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  9. Masked and elusive: congruency fails in video-to-photo face matching.Cognitive research: principles and implications · 2026
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25 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Daniel J CarragherPsychology, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, Scotland, UK. danieljcarragher@gmail.com.ORCID 0000-0003-2265-4737
Peter J B HancockPsychology, Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA, Scotland, UK.

Funding

Engineering and Physical Sciences Research Council EP/N007743/1
6 · The paper itself

Abstract

In response to the COVID-19 pandemic, many governments around the world now recommend, or require, that their citizens cover the lower half of their face in public. Consequently, many people now wear surgical face masks in public. We investigated whether surgical face masks affected the performance of human observers, and a state-of-the-art face recognition system, on tasks of perceptual face matching. Participants judged whether two simultaneously presented face photographs showed the same person or two different people. We superimposed images of surgical masks over the faces, creating three different mask conditions: control (no masks), mixed (one face wearing a mask), and masked (both faces wearing masks). We found that surgical face masks have a large detrimental effect on human face matching performance, and that the degree of impairment is the same regardless of whether one or both faces in each pair are masked. Surprisingly, this impairment is similar in size for both familiar and unfamiliar faces. When matching masked faces, human observers are biased to reject unfamiliar faces as "mismatches" and to accept familiar faces as "matches". Finally, the face recognition system showed very high classification accuracy for control and masked stimuli, even though it had not been trained to recognise masked faces. However, accuracy fell markedly when one face was masked and the other was not. Our findings demonstrate that surgical face masks impair the ability of humans, and naïve face recognition systems, to perform perceptual face matching tasks. Identification decisions for masked faces should be treated with caution.

Indexed as

MasksPattern Recognition, AutomatedAdultCoronavirus InfectionsCOVID-19Facial RecognitionHumansPandemicsPneumonia, ViralRecognition, PsychologyDeep neural networkFace recognitionFamiliarityIdentity verificationSignal detection theory

Identifiers

PMID33210257
PMCPMC7673975

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.