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During my young adulthood, I noticed my grandmother through the pane of a café. I felt astonished – she had died the previous year. I stared for a brief period, then remembered it couldn't possibly be her.

I'd experienced analogous situations all through my life. Periodically, I "identified" a person I had never met. Sometimes I could quickly pinpoint who the unfamiliar person reminded me of – like my grandmother. In other instances, a countenance simply had a indistinct knowingness I couldn't recognize.

Exploring the Range of Face Identification Capabilities

In recent times, I began questioning if different individuals have these odd experiences. When I questioned my acquaintances, one said she frequently sees persons in unpredictable places who look familiar. Others occasionally misidentify a unfamiliar individual or public figure for someone they know in real life. But some described no such experiences – they could readily recognize people they'd met and people they hadn't.

I felt fascinated by this range of perceptions. Was it just longing that made me see my grandmother that day – or some kind of brain malfunction? Studies has found we spend about a quarter-hour of every hour looking at faces – do we just have inaccuracies sometimes? I was commencing to comprehend that we can all see the same face but not interpret the same thing.

Grasping the Spectrum of Face Identification Capacities

Researchers have designed many evaluations to quantify the capacity to remember faces. There exists a extensive variety: at one extreme are superior face rememberers, who remember faces they have seen only briefly or a long time ago; at the other are people with facial agnosia, who often struggle to identify relatives, intimate companions and even themselves.

Some evaluations also capture how proficient someone is at recognizing 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 capacity to remember a face, according to neuroscience experts. It does seem that the two capabilities use distinct brain functions; for instance, there is evidence that super-recognizers and face-blind individuals do about as well as each other at identifying new faces, despite their vastly dissimilar abilities to recall old faces.

Completing Person Recognition Assessments

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

I obtained several person recognition tests. I waded through them, feeling stumped at times. In one, called the memory for faces evaluation, I had to look at monochrome photos of a face from multiple perspectives, then find it in groups. During another test that instructed me to pick out famous people from a mix of photos, many of the faces felt at least familiar, but I couldn't exactly identify them – comparable to my everyday experience.

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

Understanding Incorrect Identification Frequencies

I also performed well in the previously seen/unfamiliar faces task, which was described as particularly good for assessing someone's recall for faces. The test-taker looks at a collection of 60 grayscale photos, each of a separate face. Then they review a string of 120 similar photos – the original series plus 60 unknown visages – and identify which were in the initial group. The exceptional facial identifier cutoff is roughly 80%; I recognized 78% of the faces I'd seen. On the other end of the range, people with face blindness correctly guess an average of 57%.

I felt satisfied with my performance, but also surprised. I recalled many of the previously seen countenances, but rarely mistook a unfamiliar countenance for one that I'd seen before. My result on this indicator, called the incorrect identification frequency, 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 misidentifying a unfamiliar individual's face for my grandma's?

Investigating Possible Reasons

It was theorized that I probably possessed some exceptional facial identifier capabilities. Everyone has a inventory of the faces we know in our recollection, 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 develop and commit faces to enduring recollection. While differentiating may help me remember people, it may also deceive me into seeing my elderly relative in a woman who has a comparable demeanor.

In addition, it was thought I might be "an active face perceiver", meaning I pay a considerable notice to faces. Others may have more false alarm moments, thinking they recognize someone they don't know. But because I tend to look attentively at faces, I am prone to notice the unknown person who looks like my elderly relative. Indeed, one companion who said she doesn't make person recognition mistakes acknowledged she doesn't really look at the people around her.

Examining Over-familiarity for Faces

These tests helped me understand where I sat 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 unknown faces appear known. Superficially, this sounded like it could relate to me. But the handful of reported cases all occurred after a physical event such as a epileptic episode or stroke, unlike the idiosyncrasy that I've been noticing my whole adult life.

Through scientific platforms, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of facial recognition difficulties, including sight abnormalities, like when faces appear to be dissolving. Researchers study many of these people, using instruments like the known/unknown countenances task and the Cambridge Face Memory Test.

Experts have heard from only a handful of people with suspected HFF in many years of study.

"The occurrence rate is quite low," one expert said of HFF. However, they speculated that there may be a spectrum, with some people who think all visages is known, and others, like me, who only experience it a few times a month.

{Understanding