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During my twenties, I observed my elderly relative through the pane of a café. I felt dumbstruck – she had departed the prior year. I gazed for a brief period, then remembered 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 rapidly determine who the stranger looked like – like my grandmother. Other times, a countenance simply had a subtle recognition I couldn't recognize.

Investigating the Range of Facial Recognition Experiences

In recent times, I began questioning if other people have these odd situations. When I asked my friends, one said she frequently sees individuals in random places who look recognizable. Others at times confuse a unfamiliar individual or famous person for someone they know in actual life. But some mentioned no such experiences – they could effortlessly recognize people they'd met and people they hadn't.

I felt intrigued by this range of perceptions. Was it just desire that made me see my grandma that day – or some kind of cognitive error? Research has found we spend about 14 minutes 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 perceive the same thing.

Understanding the Spectrum of Face Identification Capacities

Scientists have designed many evaluations to quantify the ability to recognize faces. There exists a extensive variety: at one end are exceptional facial identifiers, who remember faces they have seen only for a short time or a long time ago; at the other are people with face blindness, who often find it challenging to identify relatives, close friends and even themselves.

Some assessments also measure how skilled someone is at telling if they have not seen a face before. This is where I think I fall short. 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 skills use separate brain mechanisms; for case, there is proof that super-recognizers and those with facial agnosia do about as well as each other at recognizing new faces, despite their extremely distinct abilities to recall old faces.

Undergoing Facial Recognition Evaluations

I felt curious whether these tests would provide insight on why unfamiliar individuals look recognizable. Was I someone who constantly recalls a face? I often recognize people more than they recall me, and feel let down – a sentiment that researchers say is common for super-recognizers. But maybe I excessively identify faces – to the extent that even some new faces look recognizable.

I was sent several facial recognition tests. I waded through them, feeling confused 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 lineups. During another test that directed me to pick out celebrities from a mix of photos, many of the faces felt at least familiar, but I couldn't quite place them – comparable to my real-life experience.

I felt less than confident about my outcome. But after evaluation of my results, I had accurately recognized 96% of the famous person faces. The determination was that I qualified as a "borderline super-recognizer".

Grasping Mistaken Recognition Frequencies

I also did exceptionally in the previously seen/unfamiliar faces task, which was described as particularly good for assessing someone's recognition for faces. The subject looks at a series of 60 grayscale photos, each of a different face. Then they examine a string of 120 analogous photos – the first group plus 60 unfamiliar countenances – and specify which were in the initial group. The super-recognizer threshold is roughly 80%; I recalled 78% of the faces I'd seen. On the other extreme of the range, people with face blindness properly recognize an average of 57%.

I felt content with my performance, but also surprised. I recognized many of the previously seen countenances, but infrequently mistook a unfamiliar countenance for one that I'd seen before. My result on this indicator, called the incorrect identification frequency, was 18%. Average identifiers, superior face rememberers and face-blind individuals all have a false alarm rate of about 30% on average. So why was I confusing a unfamiliar individual's face for my grandmother's?

Exploring Possible Causes

It was theorized 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 fairly substantial and high-resolution catalogue. We're also likely to individuate faces – that is, assign characteristics to each face, such as friendliness or rudeness. Research suggests that the later element helps people to develop and commit faces to enduring recollection. While individuating may help me remember people, it may also mislead me into seeing my grandmother in a woman who has a comparable demeanor.

In moreover, it was thought I might be "an engaged facial observer", meaning I pay a lot of attention to faces. Others may have more mistaken recognition moments, thinking they recognize someone they don't know. But because I tend to look attentively at faces, I am disposed to notice the unfamiliar individual who resembles 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 evaluations helped me understand where I positioned on the continuum. But I wanted to understand more about what is happening in the brain when we "recognize" unknown people. Investigating further, I read about a condition called hyperfamiliarity for faces (HFF), in which unrecognized faces appear known. Superficially, this sounded like it could pertain to me. But the handful of recorded occurrences all took place after a physical event such as a convulsion or cerebral accident, unlike the quirk that I've been noticing my whole grown-up existence.

Through scientific platforms, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of face identification problems, including perceptual alterations, like when faces appear to be melting. Researchers study many of these people, using tools like the known/unknown countenances task and the memory for faces evaluation.

Experts have heard from only a few of people with suspected HFF in long durations of research.

"The frequency is quite low," one expert said of HFF. However, they speculated 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