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In my twenties, I noticed my elderly relative through the pane of a café. I felt stunned – she had died the prior year. I looked intently for a moment, then remembered it was impossible to be her.

I'd experienced analogous experiences during my life. Occasionally, I "recognized" a person I was unacquainted with. At times I could promptly pinpoint who the unfamiliar person resembled – such as my elderly relative. In other instances, a visage simply had a indistinct knowingness I couldn't place.

Investigating the Variety of Face Identification Abilities

Recently, I started wondering if other people have these unusual encounters. When I inquired my friends, one mentioned she frequently sees people in unpredictable places who look familiar. Others occasionally misidentify a stranger or famous person for someone they know in everyday existence. But some reported completely different responses – they could effortlessly identify people they'd met and people they hadn't.

I felt curious by this range of perceptions. Was it just yearning that made me see my grandmother that day – or some kind of brain malfunction? Research has found we spend about approximately 900 seconds of every hour looking at faces – do we just err sometimes? I was starting to understand that we can all see the same face but not interpret the same thing.

Comprehending the Spectrum of Facial Recognition Capacities

Investigators have created many tests to assess the skill to recall faces. There exists a extensive variety: at one extreme are super-recognizers, who remember faces they have seen only briefly or a considerable time past; at the other are people with facial agnosia, who often struggle to know kin, intimate companions and even themselves.

Some evaluations also measure how skilled someone is at determining if they have not seen a face before. This is where I think I have limitations. But researchers "haven't extensively researched this" as much as they've looked at the skill to recognize a face, according to brain researchers. It does seem that the two capabilities use separate brain mechanisms; for instance, there is evidence that superior face rememberers and prosopagnosics do about as well as each other at recognizing new faces, despite their extremely distinct abilities to recall old faces.

Taking Face Identification Assessments

I felt interested whether these evaluations would offer understanding on why unfamiliar individuals look recognizable. Was I someone who always remembers a face? I often recognize people more than they recognize me, and feel disheartened – a sentiment that scientists say is frequent for exceptional facial identifiers. But maybe I over-recognize faces – to the point that even some new faces look known.

I received several person recognition tests. I completed them, feeling stumped at times. In one, called the Cambridge Face Memory Test, I had to look at grayscale photos of a face from three angles, then find it in groups. During another test that told me to pick out celebrities from a mix of photos, many of the faces felt at least known, but I couldn't precisely recognize them – comparable to my real-life experience.

I felt doubtful about my performance. But after analysis of my scores, I had correctly identified 96% of the famous person faces. The finding was that I qualified as a "borderline super-recognizer".

Understanding Mistaken Recognition Frequencies

I also performed well in the known/unknown countenances task, which was described as particularly good for measuring someone's recognition for faces. The test-taker looks at a collection of 60 black-and-white photos, each of a distinct face. Then they examine a series of 120 comparable photos – the original series plus 60 unknown visages – and identify which were in the initial group. The exceptional facial identifier benchmark is roughly 80%; I remembered 78% of the faces I'd seen. On the other side of the continuum, people with face blindness correctly guess an average of 57%.

I felt pleased with my result, but also astonished. I recalled many of the previously seen countenances, but seldom mistook a unknown visage for one that I'd seen before. My score on this measure, called the incorrect identification frequency, was 18%. Average identifiers, exceptional facial identifiers and face-blind individuals all have a incorrect identification frequency of about 30% on average. So why was I mistaking a stranger's face for my grandmother's?

Exploring Plausible Explanations

It was suggested that I likely possessed some exceptional facial identifier abilities. Everyone has a inventory of the faces we know in our recall, but super-recognizers – and likely almost superior rememberers like me – have a relatively large and detailed catalogue. We're also possibly to individuate faces – that is, assign traits to each face, such as amiability or discourtesy. Studies suggests that the second aspect helps people to learn and commit faces to long-term memory. While distinguishing may help me recall people, it may also mislead me into seeing my grandma in a woman who has a comparable demeanor.

In addition, it was thought I might be "an engaged facial observer", meaning I pay a significant focus to faces. Others may have more incorrect identification moments, thinking they recognize someone they don't know. But because I tend to look carefully at faces, I am inclined to notice the unknown person who similar to my grandmother. Indeed, one companion who said she doesn't make person recognition mistakes admitted she doesn't really look at the people around her.

Researching Hyperfamiliarity for Faces

These tests helped me understand where I stood on the range. But I wanted to understand more about what is happening in the brain when we "know" strangers. Researching further, I read about a disorder called hyperfamiliarity for faces (HFF), in which unfamiliar faces appear known. Initially, this sounded like it could apply to me. But the small number of documented instances all happened after a physical event such as a seizure or cerebral accident, unlike the idiosyncrasy that I've been noticing my whole grown-up existence.

Through research sites, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of person recognition difficulties, including sight abnormalities, like when faces appear to be liquefying. Researchers study many of these people, using instruments like the known/unknown countenances task and the memory for faces evaluation.

Experts have heard from only a small number of people with potential HFF in many years of investigation.

"The prevalence is quite low," one expert said of HFF. However, they hypothesized that there may be a continuum, with some people who think every face is recognizable, and others, like me, who only encounter it a few times a month.

{Understanding