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In my young adulthood, I noticed my grandmother through the pane of a café. I felt stunned – she had died the year before. I stared for a short time, then remembered it couldn't be her.

I'd had comparable occurrences all through my life. From time to time, I "knew" an individual I didn't know. Sometimes I could rapidly determine who the stranger looked like – for instance my grandmother. In other instances, a countenance simply had a subtle recognition I couldn't identify.

Exploring the Variety of Person Recognition Experiences

In recent times, I began questioning if other people have these unusual encounters. When I inquired my companions, one mentioned she often sees persons in unpredictable places who look known. Others sometimes mistake a unfamiliar individual or celebrity for someone they know in real life. But some mentioned completely different responses – they could easily distinguish people they'd met and people they hadn't.

I felt curious by this range of experiences. Was it just yearning that made me see my elderly relative that day – or some kind of cognitive error? Studies has found we spend about approximately 900 seconds of every hour looking at faces – do we just have inaccuracies sometimes? I was commencing to comprehend that we can all see the same face but not interpret the same thing.

Grasping the Spectrum of Person Recognition Skills

Researchers have created many tests to quantify the skill to recall faces. There exists a wide range: at one side are super-recognizers, who recognize faces they have seen only for a short time or a distant past; at the other are people with face blindness, who often struggle to identify kin, close friends and even themselves.

Some tests also assess how good someone is at telling if they have not seen a face before. This is where I think I have limitations. But scientists "just haven't dug into this" as much as they've studied the ability to recall a face, according to cognitive neuroscientists. It does seem that the two capabilities use separate brain processes; for instance, there is evidence that superior face rememberers and prosopagnosics do about as well as each other at recognizing new faces, despite their vastly dissimilar abilities to remember old faces.

Taking Person Recognition Assessments

I felt intrigued whether these assessments would offer understanding on why unknown people look known. Was I someone who always remembers a face? I often recall people more than they remember me, and feel let down – a emotion that experts say is typical for exceptional facial identifiers. But maybe I over-recognize faces – to the degree that even some new faces look recognizable.

I received several facial recognition tests. I worked through 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 directed me to pick out public figures from a mix of photos, many of the faces felt at least familiar, but I couldn't exactly identify them – similar to my actual experience.

I felt uncertain about my outcome. But after analysis of my performance, I had correctly identified 96% of the famous person faces. The conclusion was that I qualified as a "near-exceptional facial identifier".

Comprehending False Alarm Frequencies

I also excelled in the known/unknown countenances task, which was described as notably useful for assessing someone's memory for faces. The participant looks at a series of 60 black-and-white photos, each of a distinct face. Then they examine a sequence of 120 analogous photos – the original series plus 60 new faces – and identify which were in the original collection. The super-recognizer cutoff is roughly 80%; I remembered 78% of the faces I'd seen. On the other end of the continuum, people with facial agnosia properly recognize an average of 57%.

I felt pleased with my result, but also astonished. I recalled many of the previously seen countenances, but rarely mistook a new face for one that I'd seen before. My score on this measure, called the incorrect identification frequency, 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 misidentifying a unknown person's face for my grandma's?

Exploring Plausible Causes

It was suggested that I likely possessed some exceptional facial identifier capacities. Everyone has a database of the faces we know in our recollection, but super-recognizers – and likely borderline straddlers like me – have a relatively large and precise catalogue. We're also possibly to differentiate visages – that is, assign traits to each face, such as approachability or impoliteness. Scientific investigation suggests that the latter helps people to acquire and commit faces to enduring recollection. While differentiating may help me recognize people, it may also deceive me into seeing my grandma in a woman who has a similar air.

In furthermore, it was believed I might be "a attentive countenance examiner", meaning I pay a considerable notice to faces. Others may have more incorrect identification moments, thinking they recognize someone they don't know. But because I tend to look closely at faces, I am prone to notice the unknown person who looks like my grandmother. Indeed, one acquaintance who said she doesn't make face identification mistakes confessed she doesn't really look at the people around her.

Investigating Over-familiarity for Faces

These evaluations 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" strangers. Investigating further, I read about a condition called excessive facial recognition (HFF), in which unknown faces appear known. Initially, this sounded like it could apply to me. But the small number of reported cases all occurred after a medical episode such as a epileptic episode or cerebral accident, unlike the idiosyncrasy 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 dissolving. Researchers study many of these people, using methods like the known/unknown countenances task and the facial recall assessment.

Experts have heard from only a handful of people with possible HFF in extended periods of study.

"The occurrence rate 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 known, and others, like me, who only undergo it a several occasions a month.

{Understanding