Summary: New research shows that some people have selective difficulty recognizing faces from racial groups different from their own—a phenomenon the researchers call category-selective face blindness or other-ethnicity blindness. While general face blindness (prosopagnosia) is a well-established condition, this study reveals that many people may perform normally with faces of their own ethnicity yet struggle substantially with faces from other ethnic groups.
Researchers tested participants across several countries and found large variability in cross-ethnic face recognition abilities. These results carry important implications for the justice system, workplace interactions, and our broader understanding of human perception and cognitive diversity.
Key facts:
- Category-selective difficulty: Some individuals reliably recognize faces of their own ethnicity but have pronounced trouble with faces from other ethnic groups.
- Real-world consequences: Such selective difficulties can contribute to eyewitness misidentification, hamper social and professional interactions, and reinforce misunderstandings between groups.
- Individual differences: The study highlights substantial variability in face-processing skills, underscoring the need to treat perceptual abilities as individual traits rather than universal capacities.
Source: Swansea University
It is common for people to think they never forget a face, but for many individuals recognizing faces—especially those from other ethnic groups—is difficult.
A team at Swansea University, led by Professor Jeremy Tree and Dr Alex Jones from the School of Psychology, investigated how common this selective form of face recognition difficulty is and what consequences it might have. Their findings were published in the Journal of Experimental Psychology and contribute to a growing literature on the so-called other-ethnicity effect in face perception.
Professor Tree explained that the team has long studied developmental prosopagnosia, a lifelong and pervasive inability to recognize faces, which can be likened to a type of face-specific dyslexia. They wanted to determine whether a related but distinct pattern exists: people who are generally capable of recognizing faces from their own ethnic group but show marked impairment for faces from other ethnicities.
To investigate this, the researchers collected online test data from participants in the UK, China, South Korea, Singapore, Japan, Australia and Serbia. Asian and Caucasian participants completed tasks requiring them to compare and recognize faces, with cues such as hair, jewelry and eyewear removed to focus on facial features alone. Across multiple tests, recognition performance varied widely between individuals and across face categories.
The study found that while many people show the expected own-ethnicity advantage, a small subset of participants showed extreme, category-selective difficulties. In practical terms, someone with this profile may navigate daily life without obvious problems recognizing people from their own group but struggle repeatedly to identify people from other ethnicities.
These patterns have direct implications. In courtroom settings, for example, an eyewitness who has selective difficulty recognizing other-ethnicity faces may be more likely to make mistaken identifications, increasing the risk of wrongful convictions. In workplaces and social environments, selective recognition problems can undermine interpersonal relationships and collaboration, particularly in diverse teams.
The researchers emphasize that while social experience and exposure likely influence recognition ability, individual differences remain significant and deserve attention. Understanding the range of face recognition skills can help design fairer procedures for identification in legal contexts and encourage more inclusive practices in educational and workplace settings.
Professor Tree added that this research highlights the broader variability in human cognition: struggling with one type of perceptual task does not imply deficits across other domains. Recognizing this variability can improve how we interpret eyewitness testimony, manage diversity in organizations, and tailor interventions for those who have genuine difficulties recognizing faces.
About this facial recognition research news
Author: Kathy Thomas
Source: Swansea University
Contact: Kathy Thomas – Swansea University
Image: The image is credited to Neuroscience News
Original research: Closed access. “How prevalent is ‘other ethnicity blindness’? Exploring the extremes of recognition performance across categories of faces” by Jeremy Tree et al., Journal of Experimental Psychology
Abstract
How prevalent is “other ethnicity blindness”? Exploring the extremes of recognition performance across categories of faces
The other-ethnicity effect (OEE) is a well-documented phenomenon in which people typically recognize faces from their own ethnic group more accurately than faces from other groups. Prior work identified a subgroup with pronounced difficulty recognizing faces of other ethnicities—termed other-ethnicity blindness (OEB). This study examined how common OEB is across large samples of Asian and Caucasian participants, using three analytical approaches to measure recognition across face categories.
Using a percentile-rank method adjusted for regression to the mean, the authors observed an OEB prevalence of 1.9%, lower than earlier estimates. A single-case dissociation-style approach classified only one individual (0.25%) as showing a clear dissociation. A third approach, treating OEB as an exaggerated OEE after accounting for measurement error and regression effects, identified about 1.33% of participants with this profile. Bayesian simulations supported these prevalence estimates.
Overall, the results underline the importance of cautious classification methods and the need to account for own-ethnicity performance, measurement error, and regression to the mean in future work. While OEB appears to be rare, it can be observed in some people, and recognizing it as a “hyper” OEE profile offers a useful direction for researchers exploring individual differences in face recognition.