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Throughout my twenties, I spotted my grandma through the window of a café. I felt stunned – she had died the year before. I looked intently for a moment, then recalled it was impossible to be her.

I'd had comparable experiences throughout my life. Periodically, I "identified" an individual I was unacquainted with. At times I could rapidly determine who the stranger looked like – like my grandma. Other times, a countenance simply had a subtle recognition I couldn't recognize.

Investigating the Variety of Facial Recognition Capabilities

Lately, I began questioning if different individuals have these unusual encounters. When I questioned my friends, one said she frequently sees individuals in unexpected places who look familiar. Others at times mistake a unknown person or public figure for someone they know in real life. But some reported no such experiences – they could easily recognize people they'd met and people they hadn't.

I felt fascinated by this diversity of experiences. Was it just longing that made me see my elderly relative that day – or some kind of cognitive error? Research has found we spend about a quarter-hour of every hour looking at faces – do we just have inaccuracies sometimes? I was starting to understand that we can all see the same face but not perceive the same thing.

Comprehending the Range of Facial Recognition Skills

Investigators have created many tests to measure the capacity to remember faces. There exists a broad spectrum: at one extreme are exceptional facial identifiers, who recognize faces they have seen only for a short time or a long time ago; at the other are people with facial agnosia, who often have difficulty to know kin, dear acquaintances and even themselves.

Some tests also measure how proficient someone is at telling if they have not seen a face before. This is where I think I am deficient. But experts "haven't extensively researched this" as much as they've looked at the ability to recall a face, according to neuroscience experts. It does seem that the two abilities use distinct brain mechanisms; for example, there is proof that super-recognizers and prosopagnosics do about as well as each other at identifying new faces, despite their wildly different abilities to recall old faces.

Completing Face Identification Evaluations

I felt interested whether these tests would offer understanding on why unfamiliar individuals look known. Was I someone who constantly recalls a face? I often recall people more than they remember me, and feel disheartened – a emotion that experts say is common for super-recognizers. But maybe I over-recognize faces – to the point that even some new faces look known.

I obtained several facial recognition tests. I completed 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 different viewpoints, then find it in groups. During another test that told me to pick out celebrities from a mix of photos, many of the faces felt at least known, but I couldn't exactly identify them – comparable to my real-life experience.

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

Comprehending Mistaken Recognition Rates

I also performed well in the previously seen/unfamiliar faces task, which was described as especially effective for assessing someone's memory for faces. The participant looks at a sequence of 60 grayscale photos, each of a separate face. Then they look through a sequence of 120 similar photos – the original series plus 60 unknown visages – and identify which were in the initial group. The super-recognizer threshold is roughly 80%; I remembered 78% of the faces I'd seen. On the other end of the range, people with prosopagnosia correctly guess an average of 57%.

I felt satisfied with my result, but also astonished. I remembered many of the familiar visages, but seldom confused a new face for one that I'd seen before. My result on this measure, called the mistaken recognition percentage, was 18%. Typical rememberers, super-recognizers and prosopagnosics all have a incorrect identification frequency of about 30% on average. So why was I confusing a unfamiliar individual's face for my grandmother's?

Examining Possible Explanations

It was proposed that I probably possessed some exceptional facial identifier capabilities. Everyone has a inventory of the faces we know in our recollection, but super-recognizers – and possibly borderline straddlers like me – have a comparatively extensive and detailed catalogue. We're also likely to distinguish countenances – that is, ascribe traits to each face, such as amiability or impoliteness. Research suggests that the latter helps people to develop and commit faces to permanent recall. While individuating may help me recall people, it may also deceive me into seeing my elderly relative in a woman who has a comparable demeanor.

In furthermore, it was believed I might be "an active face perceiver", meaning I pay a significant focus to faces. Others may have more mistaken recognition moments, thinking they identify someone they don't know. But because I tend to look attentively at faces, I am inclined to notice the unfamiliar individual who looks like my grandma. Indeed, one friend who said she doesn't make face identification mistakes confessed she doesn't really look at the people around her.

Researching Over-familiarity for Faces

These tests helped me understand where I stood on the spectrum. But I wanted to understand more about what is happening in the brain when we "identify" unknown people. Investigating further, I read about a condition called excessive facial recognition (HFF), in which unfamiliar faces appear recognizable. On the surface, this sounded like it could relate to me. But the small number of recorded occurrences all occurred after a health incident such as a convulsion or brain attack, unlike the peculiarity that I've been experiencing my whole adult life.

Through research sites, experts have heard from about 24,000 those with facial agnosia, as well as people with all kinds of facial recognition problems, including perceptual alterations, like when faces appear to be melting. Researchers study many of these people, using methods like the old/new faces task and the Cambridge Face Memory Test.

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

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

{Understanding