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During my young adulthood, I spotted my grandma through the pane of a café. I felt astonished – she had died the prior year. I gazed for a moment, then remembered it was impossible to be her.

I'd experienced analogous occurrences during my life. From time to time, I "recognized" someone I didn't know. At times I could quickly identify who the stranger resembled – like my grandmother. Other times, a visage simply had a subtle recognition I couldn't place.

Investigating the Variety of Facial Recognition Experiences

In recent times, I began questioning if other people have these odd encounters. When I inquired my acquaintances, one mentioned she regularly sees individuals in unpredictable places who look known. Others occasionally mistake a unknown person or public figure for someone they know in real life. But some described no such experiences – they could readily distinguish people they'd met and people they hadn't.

I felt fascinated by this spectrum of responses. Was it just longing that made me see my grandma that day – or some kind of mental glitch? Research has found we spend about a quarter-hour of every hour looking at faces – do we just make mistakes sometimes? I was commencing to comprehend that we can all see the same face but not interpret the same thing.

Grasping the Range of Facial Recognition Skills

Scientists have created many tests to quantify the capacity to recognize faces. There exists a extensive variety: at one side are exceptional facial identifiers, who recognize faces they have seen only briefly or a long time ago; at the other are people with prosopagnosia, who often find it challenging to identify relatives, dear acquaintances and even themselves.

Some assessments also capture how proficient someone is at determining if they have not seen a face before. This is where I suspect I am deficient. But scientists "just haven't dug into this" as much as they've looked at the ability to remember a face, according to neuroscience experts. It does seem that the two capabilities use different brain functions; for case, there is evidence that exceptional facial identifiers and face-blind individuals do about as well as each other at discerning new faces, despite their vastly dissimilar abilities to remember old faces.

Taking Face Identification Evaluations

I felt intrigued whether these tests would shed some light on why unfamiliar individuals look known. Was I someone who never forgets a face? I often remember people more than they recognize me, and feel disappointed – a feeling that scientists say is common for super-recognizers. But maybe I hyper-recognize faces – to the degree that even some new faces look familiar.

I received several person 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 three angles, then find it in arrays. 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 quite place them – comparable to my actual experience.

I felt less than confident about my results. But after analysis of my scores, I had properly distinguished 96% of the public figure faces. The determination was that I qualified as a "near-exceptional facial identifier".

Comprehending Incorrect Identification Frequencies

I also excelled in the old/new faces task, which was described as notably useful for evaluating someone's memory for faces. The test-taker looks at a series of 60 black-and-white photos, each of a different face. Then they look through a string of 120 analogous photos – the first group plus 60 unfamiliar countenances – and identify which were in the original collection. The super-recognizer threshold is roughly 80%; I remembered 78% of the faces I'd seen. On the other extreme of the spectrum, people with prosopagnosia correctly guess an average of 57%.

I felt pleased with my performance, but also astonished. I remembered many of the familiar visages, but seldom confused a unknown visage for one that I'd seen before. My result on this indicator, called the false alarm rate, was 18%. Average identifiers, superior face rememberers and those with facial agnosia 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?

Exploring Potential Reasons

It was theorized that I probably possessed some exceptional facial identifier capacities. 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 relatively large and precise catalogue. We're also probably to distinguish countenances – that is, ascribe qualities to each face, such as amiability or discourtesy. Studies suggests that the second aspect helps people to acquire and store faces to permanent recall. While differentiating may help me recall people, it may also mislead me into seeing my grandmother in a woman who has a analogous presence.

In addition, it was considered 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 closely at faces, I am prone to notice the unfamiliar individual who similar to my grandmother. Indeed, one friend who said she doesn't make facial recognition mistakes acknowledged she doesn't really look at the people around her.

Researching Hyperfamiliarity for Faces

These evaluations helped me understand where I sat on the continuum. But I wanted to understand more about what is happening in the brain when we "recognize" unfamiliar individuals. Researching further, I read about a disorder called over-familiarity with countenances (HFF), in which unknown faces appear known. On the surface, this sounded like it could apply to me. But the few of recorded occurrences all occurred after a medical episode such as a epileptic episode or brain attack, unlike the peculiarity that I've been experiencing my whole grown-up existence.

Through investigative websites, experts have heard from about 24,000 those with facial agnosia, as well as people with all kinds of facial recognition difficulties, including visual distortions, like when faces appear to be melting. Researchers study many of these people, using methods like the known/unknown countenances task and the Cambridge Face Memory Test.

Experts have heard from only a handful of people with possible HFF in long durations of study.

"The prevalence is quite low," one expert said of HFF. However, they theorized that there may be a spectrum, with some people who think all visages is known, and others, like me, who only undergo it a several occasions a month.

{Understanding