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In my mid-20s, I observed my elderly relative through the glass of a coffee shop. I felt stunned – she had died the year before. I stared for a short time, then recalled it couldn't possibly be her.

I'd encountered analogous occurrences during my life. From time to time, I "identified" a person I was unacquainted with. Occasionally I could promptly determine who the stranger looked like – for instance my grandmother. Other times, a face simply had a vague familiarity I couldn't recognize.

Exploring the Spectrum of Facial Recognition Capabilities

Recently, I began questioning if others have these unusual experiences. When I inquired my companions, one commented she frequently sees people in unpredictable places who look familiar. Others sometimes misidentify a unfamiliar individual or famous person for someone they know in real life. But some mentioned completely different responses – they could readily recognize people they'd met and people they hadn't.

I felt fascinated by this range of perceptions. Was it just longing that made me see my grandma that day – or some kind of mental glitch? Scientific investigation has found we spend about 14 minutes of every hour looking at faces – do we just err sometimes? I was starting to understand that we can all see the same face but not perceive the same thing.

Comprehending the Continuum of Facial Recognition Abilities

Researchers have created many assessments to measure the ability to recall faces. There exists a extensive variety: at one side are superior face rememberers, who recall faces they have seen only briefly or a long time ago; at the other are people with face blindness, who often struggle to identify 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 "just haven't dug into this" as much as they've examined the capacity to remember a face, according to brain researchers. It does seem that the two capabilities use different brain mechanisms; for case, there is evidence that exceptional facial identifiers and face-blind individuals do about as well as each other at recognizing new faces, despite their extremely distinct abilities to remember old faces.

Taking Person Recognition Assessments

I felt curious whether these evaluations would offer understanding on why unknown people look recognizable. Was I someone who constantly recalls a face? I often recognize people more than they remember me, and feel let down – a emotion that experts say is typical for super-recognizers. But maybe I hyper-recognize faces – to the degree that even some new faces look recognizable.

I obtained several person recognition tests. I worked through them, feeling stumped at times. In one, called the memory for faces evaluation, I had to look at monochrome photos of a face from different viewpoints, then find it in arrays. During another test that instructed me to pick out famous people from a mix of photos, many of the faces felt at least familiar, but I couldn't quite place them – similar to my real-life experience.

I felt doubtful about my performance. But after evaluation of my results, I had correctly identified 96% of the celebrity faces. The conclusion was that I qualified as a "almost superior face rememberer".

Comprehending False Alarm Percentages

I also excelled in the known/unknown countenances task, which was described as especially effective for assessing someone's recognition for faces. The participant looks at a collection of 60 monochrome photos, each of a separate face. Then they look through a series of 120 similar photos – the first group plus 60 unfamiliar countenances – and identify which were in the initial group. The superior face rememberer cutoff is roughly 80%; I recognized 78% of the faces I'd seen. On the other extreme of the continuum, people with prosopagnosia correctly guess an average of 57%.

I felt satisfied with my performance, but also taken aback. I recalled many of the old faces, but infrequently mistook a new face for one that I'd seen before. My score on this indicator, called the false alarm rate, was 18%. Typical rememberers, super-recognizers and face-blind individuals all have a false alarm rate of about 30% on average. So why was I misidentifying a unfamiliar individual's face for my elderly relative's?

Exploring Potential Explanations

It was proposed that I likely possessed some exceptional facial identifier capacities. Everyone has a inventory of the faces we know in our memory, but superior face rememberers – and likely near-exceptional individuals like me – have a relatively large and high-resolution catalogue. We're also likely to individuate faces – that is, attribute characteristics to each face, such as approachability or impoliteness. Scientific investigation suggests that the second aspect helps people to develop and commit faces to permanent recall. While distinguishing may help me recognize people, it may also trick me into seeing my elderly relative in a woman who has a similar air.

In moreover, it was believed I might be "an active face perceiver", 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 attentively at faces, I am prone to notice the stranger who looks like my grandmother. Indeed, one companion who said she doesn't make facial recognition mistakes acknowledged she doesn't really look at the people around her.

Examining Excessive Recognition for Faces

These assessments helped me understand where I sat on the range. But I wanted to understand more about what is happening in the brain when we "know" unknown people. Examining further, I read about a disorder called hyperfamiliarity for faces (HFF), in which unrecognized faces appear recognizable. Superficially, this sounded like it could relate to me. But the few of documented instances all happened after a medical episode such as a convulsion or cerebral accident, unlike the peculiarity that I've been noticing my whole grown-up existence.

Through investigative websites, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of person recognition problems, including perceptual alterations, like when faces appear to be melting. Researchers study many of these people, using tools like the previously seen/unfamiliar faces task and the Cambridge Face Memory Test.

Experts have heard from only a few of people with suspected HFF in many years of research.

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

{Understanding