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Throughout my mid-20s, I noticed my grandmother through the window of a café. I felt dumbstruck – she had died the prior year. I looked intently for a moment, then recalled it couldn't possibly be her.

I'd encountered analogous occurrences all through my life. From time to time, I "recognized" someone I had never met. At times I could quickly determine who the unknown individual resembled – such as my grandma. In other instances, a countenance simply had a indistinct knowingness I couldn't recognize.

Exploring the Variety of Person Recognition Abilities

Lately, I became curious if others have these odd encounters. When I inquired my companions, one said she often sees people in unpredictable places who look familiar. Others sometimes mistake a unfamiliar individual or celebrity for someone they know in everyday existence. But some reported nothing of the kind – they could easily recognize people they'd met and people they hadn't.

I felt curious by this diversity of responses. Was it just yearning that made me see my grandmother 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 make mistakes sometimes? I was beginning to realize that we can all see the same face but not perceive the same thing.

Comprehending the Spectrum of Face Identification Skills

Investigators have developed many evaluations to measure the skill to recall faces. There exists a extensive variety: at one end are exceptional facial identifiers, who recall faces they have seen only for a short time or a long time ago; at the other are people with face blindness, who often have difficulty to know relatives, dear acquaintances and even themselves.

Some assessments also measure how good someone is at telling if they have not seen a face before. This is where I believe I have limitations. But scientists "haven't thoroughly investigated this" as much as they've studied the skill to recall a face, according to cognitive neuroscientists. It does seem that the two abilities use separate brain processes; for example, there is indication that superior face rememberers and face-blind individuals do about as well as each other at discerning new faces, despite their wildly different abilities to recall old faces.

Taking Person Recognition Evaluations

I felt intrigued whether these assessments would provide insight on why unfamiliar individuals look recognizable. Was I someone who always remembers a face? I often remember people more than they remember me, and feel disappointed – a sentiment that experts say is frequent for superior face rememberers. But maybe I over-recognize faces – to the degree that even some new faces look recognizable.

I obtained several facial recognition tests. I waded through them, feeling confused at times. In one, called the Cambridge Face Memory Test, I had to look at monochrome photos of a face from different viewpoints, then find it in lineups. During another test that instructed me to pick out celebrities from a mix of photos, many of the faces felt at least recognizable, but I couldn't exactly identify them – reminiscent to my actual experience.

I felt doubtful about my performance. But after assessment of my performance, I had accurately recognized 96% of the public figure faces. The finding was that I qualified as a "near-exceptional facial identifier".

Comprehending Mistaken Recognition Frequencies

I also did exceptionally in the known/unknown countenances task, which was described as particularly good for assessing someone's recall for faces. The test-taker looks at a sequence of 60 monochrome photos, each of a separate face. Then they examine a sequence of 120 comparable photos – the original series plus 60 unfamiliar countenances – and indicate which were in the first set. The exceptional facial identifier benchmark is roughly 80%; I recalled 78% of the faces I'd seen. On the other side of the continuum, people with prosopagnosia correctly guess an average of 57%.

I felt content with my performance, but also taken aback. I recalled many of the previously seen countenances, but infrequently misidentified a unfamiliar countenance for one that I'd seen before. My score on this measure, called the false alarm rate, was 18%. Typical rememberers, superior face rememberers and those with facial agnosia all have a mistaken recognition percentage of about 30% on average. So why was I mistaking a unknown person's face for my grandma's?

Examining Possible Explanations

It was suggested that I possibly possessed some superior face rememberer abilities. Everyone has a database of the faces we know in our memory, but super-recognizers – and possibly almost superior rememberers like me – have a fairly substantial and precise catalogue. We're also probably to distinguish countenances – that is, attribute characteristics to each face, such as approachability or discourtesy. Scientific investigation suggests that the later element helps people to acquire and retain faces to long-term memory. While differentiating may help me remember people, it may also deceive me into seeing my elderly relative in a woman who has a analogous presence.

In moreover, it was believed I might be "a attentive countenance examiner", meaning I pay a lot of attention to faces. Others may have more false alarm moments, thinking they identify someone they don't know. But because I tend to look carefully at faces, I am disposed to notice the unknown person who resembles my grandmother. Indeed, one companion who said she doesn't make facial 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 positioned on the range. But I wanted to understand more about what is happening in the brain when we "recognize" unknown people. Investigating further, I read about a condition called hyperfamiliarity for faces (HFF), in which unrecognized faces appear recognizable. Initially, this sounded like it could relate to me. But the handful of reported cases all took place after a physical event such as a convulsion or stroke, unlike the peculiarity that I've been noticing my whole grown-up existence.

Through research sites, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of person recognition challenges, including perceptual alterations, like when faces appear to be liquefying. Researchers study many of these people, using tools like the old/new faces task and the Cambridge Face Memory Test.

Experts have heard from only a small number of people with potential HFF in long durations of study.

"The occurrence rate is quite low," one expert said of HFF. However, they theorized that there may be a range, with some people who think each countenance is known, and others, like me, who only encounter it a few times a month.

{Understanding