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In my mid-20s, I spotted my grandma through the window of a coffee shop. I felt dumbstruck – she had died the prior year. I looked intently for a brief period, then reminded myself it was impossible to be her.

I'd encountered similar experiences all through my life. From time to time, I "recognized" a person I was unacquainted with. At times I could quickly pinpoint who the unfamiliar person resembled – like my elderly relative. On other occasions, a countenance simply had a vague familiarity I couldn't identify.

Investigating the Range of Face Identification Capabilities

In recent times, I began questioning if others have these peculiar encounters. When I inquired my friends, one said she often sees individuals in unexpected places who look recognizable. Others occasionally misidentify a stranger or public figure for someone they know in everyday existence. But some described completely different responses – they could readily identify people they'd met and people they hadn't.

I felt intrigued by this spectrum of responses. Was it just longing that made me see my grandmother that day – or some kind of brain malfunction? Studies has found we spend about approximately 900 seconds of every hour looking at faces – do we just make mistakes sometimes? I was starting to understand that we can all see the same face but not experience the same thing.

Comprehending the Continuum of Facial Recognition Skills

Researchers have created many tests to quantify the ability to remember faces. There exists a broad spectrum: at one end are superior face rememberers, who remember faces they have seen only for a short time or a long time ago; at the other are people with prosopagnosia, who often find it challenging to recognize relatives, intimate companions and even themselves.

Some evaluations also capture how skilled someone is at determining if they have not seen a face before. This is where I think I fall short. But experts "haven't thoroughly investigated this" as much as they've examined the ability to recall a face, according to brain researchers. It does seem that the two capabilities use distinct brain functions; for instance, there is evidence that super-recognizers and face-blind individuals do about as well as each other at recognizing new faces, despite their vastly dissimilar abilities to remember old faces.

Taking Facial Recognition Evaluations

I felt interested whether these assessments would offer understanding on why unfamiliar individuals look known. Was I someone who never forgets a face? I often remember people more than they recall me, and feel disheartened – a feeling that scientists say is typical for super-recognizers. But maybe I excessively identify faces – to the point that even some new faces look known.

I was sent several facial recognition tests. I worked through them, feeling puzzled at times. In one, called the memory for faces evaluation, I had to look at black-and-white photos of a face from different viewpoints, then find it in lineups. 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 precisely recognize them – similar to my real-life experience.

I felt less than confident about my performance. But after assessment of my performance, I had properly distinguished 96% of the famous person faces. The determination was that I qualified as a "near-exceptional facial identifier".

Comprehending Incorrect Identification Percentages

I also excelled in the previously seen/unfamiliar faces task, which was described as especially effective for evaluating someone's recognition for faces. The subject looks at a series of 60 black-and-white photos, each of a different face. Then they review a sequence of 120 comparable photos – the first group plus 60 new faces – and indicate which were in the first set. The exceptional facial identifier cutoff is roughly 80%; I recognized 78% of the faces I'd seen. On the other end of the range, people with facial agnosia properly recognize an average of 57%.

I felt content with my performance, but also surprised. I remembered many of the familiar visages, but infrequently misidentified a new face for one that I'd seen before. My result on this indicator, called the incorrect identification frequency, was 18%. Average identifiers, exceptional facial identifiers and face-blind individuals all have a incorrect identification frequency of about 30% on average. So why was I misidentifying a stranger's face for my grandmother's?

Exploring Plausible Reasons

It was suggested that I probably possessed some superior face rememberer abilities. Everyone has a catalogue of the faces we know in our recollection, but super-recognizers – and probably borderline straddlers like me – have a comparatively extensive and precise catalogue. We're also probably to differentiate visages – that is, attribute traits to each face, such as approachability or impoliteness. Scientific investigation suggests that the later element helps people to learn and store faces to long-term memory. While individuating may help me recognize people, it may also deceive me into seeing my grandma in a woman who has a comparable demeanor.

In moreover, it was believed I might be "an active face perceiver", meaning I pay a lot of attention to faces. Others may have more false alarm moments, thinking they know someone they don't know. But because I tend to look attentively at faces, I am inclined to notice the unfamiliar individual who similar to my elderly relative. Indeed, one friend who said she doesn't make face identification mistakes acknowledged she doesn't really look at the people around her.

Investigating Over-familiarity for Faces

These assessments helped me understand where I sat on the continuum. But I wanted to understand more about what is happening in the brain when we "recognize" strangers. Examining further, I read about a syndrome called excessive facial recognition (HFF), in which unrecognized faces appear recognizable. Superficially, this sounded like it could apply to me. But the small number of documented instances all happened after a physical event such as a epileptic episode or brain attack, unlike the quirk that I've been noticing 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 sight abnormalities, like when faces appear to be liquefying. Researchers study many of these people, using instruments like the previously seen/unfamiliar faces task and the facial recall assessment.

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

"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 all visages is recognizable, and others, like me, who only encounter it a several occasions a month.

{Understanding