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Throughout my twenties, I noticed my grandmother through the glass of a coffee shop. I felt dumbstruck – she had departed the previous year. I stared for a brief period, then reminded myself it couldn't possibly be her.

I'd experienced comparable experiences during my life. Periodically, I "identified" an individual I was unacquainted with. Sometimes I could promptly pinpoint who the stranger resembled – like my elderly relative. Other times, a face simply had a vague familiarity I couldn't identify.

Investigating the Variety of Person Recognition Capabilities

In recent times, I began questioning if different individuals have these peculiar situations. When I inquired my companions, one commented she regularly sees persons in random places who look familiar. Others at times confuse a stranger or public figure for someone they know in everyday existence. But some mentioned no such experiences – they could easily identify people they'd met and people they hadn't.

I felt curious by this range of perceptions. Was it just longing that made me see my grandma that day – or some kind of mental glitch? Studies has found we spend about a quarter-hour of every hour looking at faces – do we just make mistakes sometimes? I was starting to understand that we can all see the same face but not perceive the same thing.

Comprehending the Spectrum of Person Recognition Skills

Researchers have created many tests to quantify the ability to recall faces. There exists a wide range: at one end are superior face rememberers, who remember faces they have seen only momentarily or a long time ago; at the other are people with prosopagnosia, who often struggle to identify family, intimate companions and even themselves.

Some evaluations also capture how good someone is at determining if they have not seen a face before. This is where I think I have limitations. But scientists "just haven't dug into this" as much as they've looked at the ability to remember a face, according to brain researchers. It does seem that the two abilities use separate brain mechanisms; for example, there is indication that super-recognizers and prosopagnosics do about as well as each other at identifying new faces, despite their extremely distinct abilities to remember old faces.

Undergoing Facial Recognition Tests

I felt intrigued whether these assessments would shed some light on why unknown people look recognizable. Was I someone who always remembers a face? I often remember people more than they recognize me, and feel disheartened – a feeling that experts say is typical for super-recognizers. But maybe I excessively identify faces – to the extent that even some new faces look familiar.

I received several face identification tests. I worked through them, feeling confused at times. In one, called the Cambridge Face Memory Test, I had to look at monochrome photos of a face from three angles, then find it in arrays. During another test that told me to pick out public figures from a mix of photos, many of the faces felt at least known, but I couldn't quite place them – similar to my everyday experience.

I felt uncertain about my results. But after evaluation of my performance, I had properly distinguished 96% of the famous person faces. The finding was that I qualified as a "near-exceptional facial identifier".

Grasping Incorrect Identification Frequencies

I also did exceptionally in the previously seen/unfamiliar faces task, which was described as notably useful for measuring someone's recall for faces. The test-taker looks at a sequence of 60 black-and-white photos, each of a different face. Then they examine a string of 120 analogous photos – the original series plus 60 unknown visages – and specify which were in the initial group. The superior face rememberer benchmark is roughly 80%; I recognized 78% of the faces I'd seen. On the other end of the spectrum, people with prosopagnosia properly recognize an average of 57%.

I felt satisfied with my performance, but also astonished. I recalled many of the old faces, but infrequently mistook a unknown visage for one that I'd seen before. My score on this indicator, called the false alarm rate, was 18%. Normal recognizers, superior face rememberers and face-blind individuals all have a false alarm rate of about 30% on average. So why was I mistaking a unfamiliar individual's face for my grandmother's?

Examining Potential Explanations

It was suggested that I likely possessed some super-recognizer capabilities. Everyone has a database of the faces we know in our recall, but super-recognizers – and likely near-exceptional individuals like me – have a fairly substantial and detailed catalogue. We're also probably to differentiate visages – that is, attribute traits to each face, such as approachability or impoliteness. Research suggests that the latter helps people to learn and commit faces to permanent recall. While distinguishing may help me remember people, it may also trick me into seeing my grandmother in a woman who has a comparable demeanor.

In furthermore, it was considered I might be "an active face perceiver", meaning I pay a significant focus to faces. Others may have more false alarm moments, thinking they know someone they don't know. But because I tend to look closely at faces, I am inclined to notice the unfamiliar individual who similar to my grandmother. Indeed, one acquaintance who said she doesn't make face identification mistakes admitted she doesn't really look at the people around her.

Examining 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 "identify" strangers. Investigating further, I read about a syndrome called over-familiarity with countenances (HFF), in which unrecognized faces appear recognizable. Superficially, this sounded like it could pertain to me. But the handful of recorded occurrences all happened after a medical episode such as a epileptic episode or brain attack, unlike the peculiarity that I've been observing my whole adult life.

Through research sites, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of person recognition difficulties, including perceptual alterations, like when faces appear to be dissolving. Researchers study many of these people, using instruments like the previously seen/unfamiliar faces task and the Cambridge Face Memory Test.

Experts have heard from only a handful of people with potential HFF in long durations of investigation.

"The frequency is quite low," one expert said of HFF. However, they speculated that there may be a spectrum, with some people who think each countenance is familiar, and others, like me, who only encounter it a several occasions a month.

{Understanding