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Throughout my mid-20s, I noticed my grandma through the pane of a coffee house. I felt stunned – she had died the previous year. I looked intently for a moment, then remembered it was impossible to be her.

I'd encountered analogous experiences during my life. From time to time, I "knew" someone I had never met. Occasionally I could promptly determine who the stranger reminded me of – such as my grandma. Other times, a face simply had a indistinct knowingness I couldn't recognize.

Investigating the Range of Facial Recognition Capabilities

Recently, I began questioning if others have these odd encounters. When I questioned my companions, one commented she often sees people in unpredictable places who look recognizable. Others sometimes confuse a stranger or public figure for someone they know in real life. But some described completely different responses – they could effortlessly identify people they'd met and people they hadn't.

I felt fascinated by this range of perceptions. Was it just desire that made me see my elderly relative that day – or some kind of cognitive error? Studies has found we spend about a quarter-hour of every hour looking at faces – do we just make mistakes sometimes? I was commencing to comprehend that we can all see the same face but not interpret the same thing.

Comprehending the Spectrum of Facial Recognition Abilities

Researchers have created many assessments to assess the capacity to recall faces. There exists a extensive variety: at one side are super-recognizers, who recognize faces they have seen only briefly or a long time ago; at the other are people with facial agnosia, who often have difficulty to identify relatives, intimate companions and even themselves.

Some evaluations also capture how proficient someone is at determining if they have not seen a face before. This is where I think I fall short. But experts "just haven't dug into this" as much as they've studied the ability to remember a face, according to cognitive neuroscientists. It does seem that the two abilities use separate brain functions; for case, there is proof that superior face rememberers and face-blind individuals do about as well as each other at recognizing new faces, despite their vastly dissimilar abilities to recognize old faces.

Taking Person Recognition Tests

I felt intrigued whether these tests would shed some light on why unknown people look known. Was I someone who never forgets a face? I often remember people more than they recognize me, and feel disheartened – a sentiment that experts say is frequent for exceptional facial identifiers. But maybe I over-recognize faces – to the point that even some new faces look familiar.

I received several facial recognition tests. I completed them, feeling puzzled at times. In one, called the Cambridge Face Memory Test, I had to look at monochrome photos of a face from multiple perspectives, 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 known, but I couldn't precisely recognize them – comparable to my everyday experience.

I felt less than confident about my results. But after assessment of my scores, I had correctly identified 96% of the public figure faces. The conclusion was that I qualified as a "near-exceptional facial identifier".

Comprehending Incorrect Identification Rates

I also did exceptionally in the known/unknown countenances task, which was described as especially effective for assessing someone's recall for faces. The participant looks at a sequence of 60 monochrome photos, each of a distinct face. Then they review a series of 120 similar photos – the original series plus 60 unknown visages – and indicate which were in the original collection. The superior face rememberer cutoff is roughly 80%; I remembered 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 score, but also astonished. I recognized many of the familiar visages, but infrequently misidentified a unfamiliar countenance for one that I'd seen before. My result on this indicator, called the false alarm rate, was 18%. Normal recognizers, exceptional facial identifiers and those with facial agnosia all have a incorrect identification frequency of about 30% on average. So why was I mistaking a unknown person's face for my grandma's?

Investigating Possible Reasons

It was theorized that I probably possessed some superior face rememberer capacities. Everyone has a inventory of the faces we know in our recall, but exceptional facial identifiers – and likely borderline straddlers like me – have a comparatively extensive and high-resolution catalogue. We're also probably to distinguish countenances – that is, attribute characteristics to each face, such as approachability or discourtesy. Studies suggests that the later element helps people to develop and store faces to permanent recall. While distinguishing may help me remember people, it may also trick me into seeing my elderly relative in a woman who has a similar air.

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

Researching Over-familiarity for Faces

These assessments helped me understand where I stood on the continuum. But I wanted to understand more about what is happening in the brain when we "recognize" strangers. Investigating further, I read about a syndrome called excessive facial recognition (HFF), in which unfamiliar faces appear recognizable. On the surface, this sounded like it could relate to me. But the small number of documented instances all occurred after a medical episode such as a epileptic episode or cerebral accident, unlike the peculiarity that I've been observing 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 facial recognition challenges, including sight abnormalities, like when faces appear to be liquefying. Researchers study many of these people, using methods like the known/unknown countenances task and the Cambridge Face Memory Test.

Experts have heard from only a handful of people with suspected HFF in long durations of investigation.

"The prevalence is quite low," one expert said of HFF. However, they speculated that there may be a range, with some people who think every face is familiar, and others, like me, who only undergo it a multiple instances a month.

{Understanding