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Throughout my young adulthood, I noticed my grandma through the glass of a coffee shop. I felt astonished – she had died the previous year. I gazed for a moment, then recalled it was impossible to be her.

I'd had analogous experiences all through my life. From time to time, I "recognized" an individual I had never met. Occasionally I could promptly identify who the unfamiliar person looked like – such as my elderly relative. In other instances, a countenance simply had a indistinct knowingness I couldn't recognize.

Investigating the Range of Facial Recognition Abilities

Recently, I began questioning if other people have these peculiar encounters. When I asked my friends, one mentioned she frequently sees persons in unpredictable places who look recognizable. Others at times mistake a stranger or famous person for someone they know in everyday existence. But some described no such experiences – they could readily recognize people they'd met and people they hadn't.

I felt fascinated by this diversity of perceptions. Was it just desire that made me see my grandmother that day – or some kind of brain malfunction? Studies has found we spend about approximately 900 seconds of every hour looking at faces – do we just make mistakes sometimes? I was beginning to realize that we can all see the same face but not interpret the same thing.

Grasping the Spectrum of Person Recognition Abilities

Investigators have developed many evaluations to quantify the ability to recognize faces. There exists a wide range: at one extreme are superior face rememberers, who recognize faces they have seen only for a short time or a distant past; at the other are people with facial agnosia, who often struggle to recognize kin, close friends and even themselves.

Some evaluations also measure how good someone is at determining if they have not seen a face before. This is where I suspect I fall short. But experts "just haven't dug into this" as much as they've looked at the skill to remember a face, according to neuroscience experts. It does seem that the two skills use separate brain functions; for instance, there is proof that exceptional facial identifiers and prosopagnosics do about as well as each other at recognizing new faces, despite their wildly different abilities to recognize old faces.

Undergoing Facial Recognition Assessments

I felt interested whether these assessments would shed some light on why strangers look known. Was I someone who always remembers a face? I often remember people more than they remember me, and feel disheartened – a emotion that scientists say is common for superior face rememberers. But maybe I hyper-recognize faces – to the extent that even some new faces look recognizable.

I was sent several facial recognition tests. I waded through them, feeling stumped at times. In one, called the facial recall assessment, I had to look at grayscale photos of a face from multiple perspectives, then find it in lineups. 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 exactly identify them – comparable to my actual experience.

I felt doubtful about my performance. But after analysis of my results, I had accurately recognized 96% of the famous person faces. The determination was that I qualified as a "borderline super-recognizer".

Comprehending False Alarm Percentages

I also performed well in the old/new faces task, which was described as especially effective for evaluating someone's memory for faces. The subject looks at a collection of 60 grayscale photos, each of a distinct face. Then they look through a sequence of 120 analogous photos – the first group plus 60 new faces – and indicate which were in the original collection. The exceptional facial identifier threshold is roughly 80%; I recognized 78% of the faces I'd seen. On the other extreme of the continuum, people with face blindness correctly guess an average of 57%.

I felt satisfied with my score, but also surprised. I recalled many of the old faces, but rarely misidentified a new face for one that I'd seen before. My score on this indicator, called the incorrect identification frequency, was 18%. Average identifiers, exceptional facial identifiers and face-blind individuals all have a false alarm rate of about 30% on average. So why was I mistaking a unknown person's face for my grandmother's?

Exploring Plausible Causes

It was suggested that I likely possessed some super-recognizer capabilities. Everyone has a catalogue of the faces we know in our recall, but superior face rememberers – and possibly near-exceptional individuals like me – have a comparatively extensive and detailed catalogue. We're also possibly to differentiate visages – that is, assign characteristics to each face, such as amiability or impoliteness. Scientific investigation suggests that the second aspect helps people to acquire and commit faces to permanent recall. While differentiating may help me recall people, it may also deceive me into seeing my grandmother in a woman who has a comparable demeanor.

In addition, it was believed I might be "an active face perceiver", meaning I pay a significant focus to faces. Others may have more incorrect identification moments, thinking they know someone they don't know. But because I tend to look closely at faces, I am prone to notice the unfamiliar individual who looks like my elderly relative. Indeed, one acquaintance who said she doesn't make facial recognition mistakes admitted she doesn't really look at the people around her.

Investigating Hyperfamiliarity for Faces

These tests helped me understand where I positioned on the spectrum. But I wanted to understand more about what is happening in the brain when we "recognize" unfamiliar individuals. Researching further, I read about a condition called excessive facial recognition (HFF), in which unknown faces appear recognizable. On the surface, this sounded like it could apply to me. But the small number of reported cases all occurred after a physical event such as a convulsion or stroke, unlike the peculiarity that I've been experiencing 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 challenges, including perceptual alterations, like when faces appear to be liquefying. Researchers study many of these people, using tools like the previously seen/unfamiliar faces task and the facial recall assessment.

Experts have heard from only a small number of people with possible HFF in extended periods 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 all visages is recognizable, and others, like me, who only encounter it a few times a month.

{Understanding