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Throughout my mid-20s, I observed my grandmother through the pane of a coffee shop. I felt astonished – she had died the year before. I looked intently for a short time, then recalled it couldn't be her.

I'd encountered comparable occurrences all through my life. Occasionally, I "identified" someone I didn't know. Sometimes I could promptly determine who the unfamiliar person looked like – for instance my grandma. On other occasions, a visage simply had a vague familiarity I couldn't identify.

Exploring the Range of Facial Recognition Abilities

Lately, I started wondering if other people have these odd encounters. When I questioned my companions, one mentioned she regularly sees individuals in random places who look known. Others occasionally misidentify a unfamiliar individual or famous person for someone they know in actual life. But some reported no such experiences – they could effortlessly identify people they'd met and people they hadn't.

I felt intrigued by this spectrum of perceptions. Was it just yearning that made me see my elderly relative that day – or some kind of brain malfunction? Studies has found we spend about 14 minutes 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 interpret the same thing.

Grasping the Range of Facial Recognition Capacities

Scientists have developed many tests to assess the capacity to recognize faces. There exists a broad spectrum: at one end are exceptional facial identifiers, who recognize faces they have seen only momentarily or a long time ago; at the other are people with face blindness, who often struggle to recognize family, close friends and even themselves.

Some evaluations also assess how proficient someone is at determining if they have not seen a face before. This is where I believe I fall short. But experts "haven't thoroughly investigated this" as much as they've studied the capacity to remember a face, according to cognitive neuroscientists. It does seem that the two abilities use distinct brain mechanisms; for example, there is indication that exceptional facial identifiers and prosopagnosics do about as well as each other at discerning new faces, despite their extremely distinct abilities to recognize old faces.

Taking Face Identification Tests

I felt curious whether these tests would offer understanding on why strangers look known. Was I someone who always remembers a face? I often recall people more than they remember me, and feel let down – a sentiment that experts say is common for superior face rememberers. But maybe I hyper-recognize faces – to the extent that even some new faces look recognizable.

I was sent several person recognition tests. I completed them, feeling confused at times. In one, called the Cambridge Face Memory Test, 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 famous people from a mix of photos, many of the faces felt at least familiar, but I couldn't precisely recognize them – comparable to my real-life experience.

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

Comprehending False Alarm Rates

I also did exceptionally in the old/new faces task, which was described as particularly good for assessing someone's recognition for faces. The participant looks at a collection of 60 black-and-white photos, each of a separate face. Then they look through a series of 120 similar photos – the first group plus 60 new faces – and indicate 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 end of the range, people with prosopagnosia properly recognize an average of 57%.

I felt content with my score, but also surprised. I remembered many of the previously seen countenances, but infrequently misidentified a unknown visage for one that I'd seen before. My score on this indicator, called the mistaken recognition percentage, was 18%. Typical rememberers, superior face rememberers and face-blind individuals all have a incorrect identification frequency of about 30% on average. So why was I misidentifying a unfamiliar individual's face for my elderly relative's?

Investigating Potential Reasons

It was theorized that I probably possessed some super-recognizer capabilities. Everyone has a catalogue of the faces we know in our recall, but exceptional facial identifiers – and possibly near-exceptional individuals like me – have a comparatively extensive and precise catalogue. We're also possibly to distinguish countenances – that is, attribute qualities to each face, such as friendliness or discourtesy. Studies suggests that the later element helps people to acquire and retain faces to permanent recall. While differentiating may help me recognize people, it may also mislead me into seeing my grandmother in a woman who has a similar air.

In furthermore, it was believed I might be "an active face perceiver", meaning I pay a considerable notice to faces. Others may have more mistaken recognition moments, thinking they know someone they don't know. But because I tend to look carefully at faces, I am prone to notice the unfamiliar individual who resembles my grandmother. Indeed, one companion who said she doesn't make person recognition mistakes confessed she doesn't really look at the people around her.

Investigating Excessive Recognition 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 "know" unknown people. Examining further, I read about a syndrome called hyperfamiliarity for faces (HFF), in which unrecognized faces appear known. On the surface, this sounded like it could pertain to me. But the few of reported cases all occurred after a medical episode such as a convulsion or cerebral accident, unlike the quirk that I've been noticing my whole adult life.

Through investigative websites, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of facial recognition difficulties, including visual distortions, like when faces appear to be dissolving. Researchers study many of these people, using tools 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 many years of study.

"The occurrence rate 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 familiar, and others, like me, who only undergo it a multiple instances a month.

{Understanding