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In my mid-20s, I noticed my elderly relative through the pane of a coffee shop. I felt astonished – she had died the prior year. I gazed for a brief period, then recalled it couldn't be her.

I'd experienced similar occurrences during my life. From time to time, I "recognized" an individual I was unacquainted with. Occasionally I could promptly identify who the unfamiliar person resembled – for instance my elderly relative. In other instances, a visage simply had a subtle recognition I couldn't recognize.

Exploring the Variety of Face Identification Abilities

Recently, I began questioning if others have these unusual encounters. When I asked my friends, one said she often sees individuals in unexpected places who look recognizable. Others at times confuse a unknown person or famous person for someone they know in actual life. But some mentioned nothing of the kind – they could readily distinguish people they'd met and people they hadn't.

I felt intrigued by this range of perceptions. Was it just longing that made me see my elderly relative 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 err sometimes? I was commencing to comprehend that we can all see the same face but not perceive the same thing.

Understanding the Spectrum of Facial Recognition Abilities

Scientists have created many evaluations to measure the ability to recall faces. There exists a broad spectrum: at one end are superior face rememberers, who recall faces they have seen only for a short time or a distant past; at the other are people with face blindness, who often have difficulty to know relatives, intimate companions and even themselves.

Some tests also assess how skilled someone is at recognizing if they have not seen a face before. This is where I believe I have limitations. But experts "haven't extensively researched this" as much as they've looked at the ability to remember a face, according to cognitive neuroscientists. It does seem that the two capabilities use distinct brain mechanisms; for case, there is evidence that exceptional facial identifiers and prosopagnosics do about as well as each other at recognizing new faces, despite their wildly different abilities to recall old faces.

Completing Person Recognition Tests

I felt curious whether these tests would offer understanding on why strangers look recognizable. Was I someone who always remembers a face? I often recall people more than they remember me, and feel let down – a emotion that scientists say is frequent for exceptional facial identifiers. But maybe I over-recognize faces – to the point that even some new faces look recognizable.

I obtained several face identification tests. I waded through them, feeling confused at times. In one, called the facial recall assessment, I had to look at black-and-white photos of a face from different viewpoints, then find it in lineups. During another test that instructed me to pick out famous people from a mix of photos, many of the faces felt at least recognizable, but I couldn't precisely recognize them – comparable to my real-life experience.

I felt uncertain about my outcome. But after analysis of my results, I had accurately recognized 96% of the public figure faces. The conclusion was that I qualified as a "near-exceptional facial identifier".

Grasping False Alarm Percentages

I also did exceptionally in the known/unknown countenances task, which was described as notably useful for measuring someone's memory for faces. The test-taker looks at a series of 60 grayscale photos, each of a distinct face. Then they examine a string of 120 similar photos – the original series plus 60 unknown visages – and specify which were in the first set. The superior face rememberer threshold is roughly 80%; I remembered 78% of the faces I'd seen. On the other side of the range, people with face blindness properly recognize an average of 57%.

I felt content with my result, but also taken aback. I recalled many of the old faces, but infrequently confused a unfamiliar countenance for one that I'd seen before. My score on this metric, called the incorrect identification frequency, was 18%. Typical rememberers, exceptional facial identifiers and those with facial agnosia all have a false alarm rate of about 30% on average. So why was I confusing a unfamiliar individual's face for my elderly relative's?

Exploring Possible Causes

It was proposed that I possibly possessed some super-recognizer capacities. Everyone has a inventory of the faces we know in our memory, but exceptional facial identifiers – and possibly almost superior rememberers like me – have a comparatively extensive and detailed catalogue. We're also likely to individuate faces – that is, assign qualities to each face, such as amiability or rudeness. Studies suggests that the later element helps people to develop and store faces to long-term memory. While differentiating may help me recognize people, it may also deceive 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 unknown person who resembles my grandma. Indeed, one companion who said she doesn't make face identification mistakes acknowledged she doesn't really look at the people around her.

Investigating Hyperfamiliarity for Faces

These assessments helped me understand where I sat 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 disorder called hyperfamiliarity for faces (HFF), in which unknown faces appear recognizable. Initially, this sounded like it could pertain to me. But the few of recorded occurrences all happened after a medical episode such as a seizure or brain attack, unlike the peculiarity that I've been noticing my whole adult life.

Through research sites, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of face identification challenges, including visual distortions, like when faces appear to be liquefying. 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 small number of people with possible HFF in long durations of research.

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

{Understanding