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In my mid-20s, I noticed my grandma through the window of a coffee house. I felt dumbstruck – she had departed the prior year. I looked intently for a short time, then reminded myself it couldn't possibly be her.

I'd experienced comparable situations all through my life. Periodically, I "recognized" a person I didn't know. Occasionally I could rapidly determine who the unknown individual reminded me of – such as my grandma. In other instances, a countenance simply had a subtle recognition I couldn't place.

Examining the Spectrum of Person Recognition Experiences

In recent times, I became curious if others have these odd encounters. When I asked my acquaintances, one mentioned she regularly sees persons in unpredictable places who look known. Others sometimes confuse a unfamiliar individual or public figure for someone they know in real life. But some mentioned nothing of the kind – they could easily recognize people they'd met and people they hadn't.

I felt fascinated by this spectrum of responses. Was it just desire that made me see my grandmother that day – or some kind of mental glitch? Scientific investigation has found we spend about approximately 900 seconds 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 experience the same thing.

Comprehending the Range of Facial Recognition Capacities

Scientists have created many evaluations to quantify the skill to remember faces. There exists a broad spectrum: at one extreme are super-recognizers, who recall faces they have seen only momentarily or a distant past; at the other are people with prosopagnosia, who often have difficulty to know kin, intimate companions and even themselves.

Some tests also capture how proficient someone is at telling if they have not seen a face before. This is where I suspect I am deficient. But researchers "haven't thoroughly investigated 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 distinct brain processes; for instance, there is evidence that superior face rememberers and those with facial agnosia do about as well as each other at recognizing new faces, despite their vastly dissimilar abilities to recall old faces.

Undergoing Facial Recognition Evaluations

I felt intrigued whether these tests would shed some light on why strangers look known. Was I someone who constantly recalls a face? I often recognize people more than they recognize me, and feel disheartened – a emotion that scientists say is typical for exceptional facial identifiers. But maybe I excessively identify faces – to the point that even some new faces look recognizable.

I received several facial 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 three angles, then find it in groups. During another test that instructed me to pick out public figures from a mix of photos, many of the faces felt at least known, but I couldn't precisely recognize them – reminiscent to my real-life experience.

I felt less than confident about my outcome. But after analysis of my performance, I had accurately recognized 96% of the celebrity faces. The determination was that I qualified as a "borderline super-recognizer".

Grasping Mistaken Recognition Percentages

I also did exceptionally in the old/new faces task, which was described as particularly good for assessing someone's recall for faces. The participant looks at a sequence of 60 black-and-white photos, each of a separate face. Then they look through a sequence of 120 similar photos – the first group plus 60 new faces – and specify which were in the first set. The superior face rememberer cutoff is roughly 80%; I recalled 78% of the faces I'd seen. On the other side of the range, people with prosopagnosia correctly guess an average of 57%.

I felt satisfied with my performance, but also surprised. I recognized many of the old faces, but seldom misidentified a new face for one that I'd seen before. My performance on this measure, called the incorrect identification frequency, was 18%. Normal recognizers, superior face rememberers and those with facial agnosia all have a incorrect identification frequency of about 30% on average. So why was I misidentifying a unknown person's face for my grandmother's?

Examining Possible Explanations

It was proposed that I likely possessed some super-recognizer abilities. Everyone has a inventory of the faces we know in our memory, but exceptional facial identifiers – and probably borderline straddlers like me – have a comparatively extensive and precise catalogue. We're also likely to distinguish countenances – that is, attribute traits to each face, such as approachability or rudeness. Scientific investigation suggests that the latter helps people to develop and commit faces to permanent recall. While individuating may help me recall people, it may also trick me into seeing my elderly relative in a woman who has a analogous presence.

In moreover, it was considered I might be "a attentive countenance examiner", meaning I pay a lot of attention to faces. Others may have more mistaken recognition moments, thinking they know someone they don't know. But because I tend to look attentively at faces, I am disposed to notice the unknown person who resembles my grandmother. Indeed, one friend who said she doesn't make person recognition mistakes confessed she doesn't really look at the people around her.

Examining Excessive Recognition for Faces

These tests helped me understand where I positioned 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 familiar. On the surface, this sounded like it could apply to me. But the handful of reported cases all took place after a physical event such as a seizure or cerebral accident, unlike the peculiarity that I've been observing my whole grown-up existence.

Through scientific platforms, experts have heard from about 24,000 face-blind individuals, as well as people with all kinds of face identification difficulties, including perceptual alterations, like when faces appear to be dissolving. 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 possible HFF in many years of study.

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

{Understanding