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In my twenties, I observed my elderly relative through the window of a café. I felt dumbstruck – she had departed the previous year. I gazed for a brief period, then remembered it couldn't possibly be her.

I'd had similar situations all through my life. Periodically, I "knew" a person I was unacquainted with. Occasionally I could rapidly determine who the unknown individual resembled – for instance my grandma. On other occasions, a countenance simply had a indistinct knowingness I couldn't recognize.

Exploring the Spectrum of Facial Recognition Capabilities

Lately, I began questioning if different individuals have these unusual experiences. When I questioned my companions, one said she frequently sees persons in unexpected places who look familiar. Others sometimes mistake a unknown person or public figure for someone they know in real life. But some mentioned nothing of the kind – they could readily distinguish people they'd met and people they hadn't.

I felt fascinated by this range of responses. Was it just yearning that made me see my elderly relative that day – or some kind of mental glitch? Studies has found we spend about 14 minutes 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 Spectrum of Person Recognition Skills

Scientists have developed many tests to assess the capacity to remember faces. There exists a extensive variety: at one end are superior face rememberers, who remember faces they have seen only momentarily or a distant past; at the other are people with prosopagnosia, who often struggle to know relatives, dear acquaintances and even themselves.

Some evaluations also assess how good someone is at telling if they have not seen a face before. This is where I suspect I fall short. But experts "haven't thoroughly investigated this" as much as they've studied the capacity to recall a face, according to brain researchers. It does seem that the two abilities use different brain mechanisms; for example, there is proof that super-recognizers and those with facial agnosia do about as well as each other at discerning new faces, despite their extremely distinct abilities to recall old faces.

Undergoing Face Identification Evaluations

I felt intrigued whether these evaluations would offer understanding on why unknown people look known. Was I someone who constantly recalls a face? I often remember people more than they remember me, and feel disappointed – a sentiment that researchers say is common for super-recognizers. But maybe I over-recognize faces – to the degree that even some new faces look recognizable.

I was sent several face identification tests. I completed them, feeling stumped at times. In one, called the facial recall assessment, I had to look at monochrome photos of a face from different viewpoints, then find it in arrays. During another test that directed me to pick out public figures from a mix of photos, many of the faces felt at least recognizable, but I couldn't quite place them – comparable to my actual experience.

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

Comprehending False Alarm Rates

I also performed well in the previously seen/unfamiliar faces task, which was described as notably useful for evaluating someone's memory for faces. The test-taker looks at a collection of 60 black-and-white photos, each of a separate face. Then they examine a series of 120 analogous photos – the original series plus 60 new faces – and specify which were in the first set. The super-recognizer cutoff is roughly 80%; I recalled 78% of the faces I'd seen. On the other side of the continuum, people with facial agnosia correctly guess an average of 57%.

I felt pleased with my performance, but also taken aback. I recognized many of the familiar visages, but infrequently misidentified a unfamiliar countenance for one that I'd seen before. My performance on this measure, called the false alarm rate, was 18%. Average identifiers, superior face rememberers and prosopagnosics all have a incorrect identification frequency of about 30% on average. So why was I misidentifying a unfamiliar individual's face for my grandmother's?

Examining Plausible Explanations

It was suggested that I possibly 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 fairly substantial and precise catalogue. We're also possibly to individuate faces – that is, assign characteristics to each face, such as approachability or discourtesy. Scientific investigation suggests that the latter helps people to learn and retain faces to enduring recollection. While distinguishing may help me remember people, it may also deceive me into seeing my grandma in a woman who has a comparable demeanor.

In furthermore, it was believed I might be "a attentive countenance examiner", meaning I pay a considerable notice to faces. Others may have more incorrect identification moments, thinking they identify someone they don't know. But because I tend to look closely at faces, I am disposed to notice the unfamiliar individual who similar to my grandma. Indeed, one friend who said she doesn't make facial recognition mistakes confessed she doesn't really look at the people around her.

Researching Hyperfamiliarity for Faces

These evaluations helped me understand where I sat on the spectrum. But I wanted to understand more about what is happening in the brain when we "recognize" unfamiliar individuals. Examining further, I read about a syndrome called over-familiarity with countenances (HFF), in which unknown faces appear familiar. Initially, this sounded like it could relate to me. But the small number of reported cases all took place after a health incident such as a seizure or cerebral accident, unlike the quirk 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 challenges, including visual distortions, like when faces appear to be liquefying. Researchers study many of these people, using tools like the old/new faces task and the facial recall assessment.

Experts have heard from only a handful of people with potential 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 undergo it a several occasions a month.

{Understanding