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Throughout my twenties, I spotted my elderly relative through the glass of a coffee shop. I felt dumbstruck – she had departed the prior year. I gazed for a moment, then remembered it couldn't possibly be her.

I'd had similar experiences during my life. From time to time, I "identified" a person I was unacquainted with. Sometimes I could rapidly pinpoint who the unknown individual reminded me of – like my grandma. In other instances, a countenance simply had a vague familiarity I couldn't recognize.

Exploring the Range of Person Recognition Abilities

Recently, I started wondering if others have these odd experiences. When I inquired my companions, one said she regularly sees persons in random places who look recognizable. Others at times mistake a unknown person or famous person for someone they know in real life. But some described no such experiences – they could effortlessly identify people they'd met and people they hadn't.

I felt curious by this range of responses. Was it just yearning that made me see my grandmother that day – or some kind of mental glitch? Scientific investigation has found we spend about 14 minutes of every hour looking at faces – do we just err sometimes? I was beginning to realize that we can all see the same face but not perceive the same thing.

Comprehending the Spectrum of Face Identification Skills

Scientists have created many assessments to measure the capacity to recall faces. There exists a wide range: at one end are super-recognizers, who remember faces they have seen only for a short time or a considerable time past; at the other are people with face blindness, who often find it challenging to recognize relatives, dear acquaintances and even themselves.

Some assessments also assess how proficient someone is at telling if they have not seen a face before. This is where I believe I fall short. But scientists "just haven't dug into this" as much as they've studied the skill to remember a face, according to brain researchers. It does seem that the two skills use separate brain mechanisms; for example, there is proof that super-recognizers and face-blind individuals do about as well as each other at identifying new faces, despite their extremely distinct abilities to recognize old faces.

Undergoing Facial Recognition Tests

I felt intrigued whether these evaluations would provide insight on why unknown people look familiar. Was I someone who never forgets a face? I often recognize people more than they recognize me, and feel disheartened – a feeling that scientists say is frequent for super-recognizers. But maybe I over-recognize faces – to the point that even some new faces look recognizable.

I obtained several person recognition tests. I worked through them, feeling stumped at times. In one, called the memory for faces evaluation, I had to look at black-and-white photos of a face from multiple perspectives, then find it in lineups. During another test that told me to pick out famous people 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 doubtful about my performance. But after analysis of my results, I had accurately recognized 96% of the celebrity faces. The finding was that I qualified as a "near-exceptional facial identifier".

Grasping Mistaken Recognition Frequencies

I also excelled in the old/new faces task, which was described as particularly good for evaluating someone's recognition for faces. The test-taker looks at a series of 60 monochrome photos, each of a different face. Then they examine a string of 120 analogous photos – the first group plus 60 new faces – and indicate which were in the first set. The super-recognizer cutoff is roughly 80%; I recognized 78% of the faces I'd seen. On the other extreme of the continuum, people with face blindness accurately identify an average of 57%.

I felt pleased with my score, but also taken aback. I recalled many of the old faces, but seldom confused a unknown visage for one that I'd seen before. My score on this metric, called the false alarm rate, was 18%. Typical rememberers, superior face rememberers and prosopagnosics all have a mistaken recognition percentage of about 30% on average. So why was I confusing a unfamiliar individual's face for my grandmother's?

Exploring Possible Causes

It was proposed that I possibly possessed some super-recognizer abilities. Everyone has a database of the faces we know in our recall, but super-recognizers – and probably almost superior rememberers like me – have a relatively large and detailed catalogue. We're also probably to differentiate visages – that is, assign traits to each face, such as amiability or rudeness. Research suggests that the latter helps people to develop and retain faces to enduring recollection. While distinguishing may help me remember people, it may also deceive me into seeing my elderly relative in a woman who has a analogous presence.

In moreover, it was considered I might be "a attentive countenance examiner", meaning I pay a significant focus to faces. Others may have more false alarm moments, thinking they recognize someone they don't know. But because I tend to look closely at faces, I am disposed to notice the unknown person who similar to my grandmother. Indeed, one acquaintance who said she doesn't make person recognition mistakes confessed she doesn't really look at the people around her.

Examining Over-familiarity for Faces

These evaluations helped me understand where I stood on the continuum. But I wanted to understand more about what is happening in the brain when we "know" unfamiliar individuals. Researching further, I read about a disorder called excessive facial recognition (HFF), in which unrecognized faces appear known. Initially, this sounded like it could pertain to me. But the small number of recorded occurrences all occurred after a physical event such as a seizure or brain attack, unlike the idiosyncrasy that I've been noticing my whole grown-up existence.

Through scientific platforms, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of facial recognition problems, including visual distortions, like when faces appear to be liquefying. Researchers study many of these people, using tools like the previously seen/unfamiliar faces task and the memory for faces evaluation.

Experts have heard from only a small number of people with potential HFF in extended periods of study.

"The prevalence is quite low," one expert said of HFF. However, they hypothesized that there may be a spectrum, with some people who think each countenance is familiar, and others, like me, who only undergo it a few times a month.

{Understanding