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Throughout my twenties, I spotted my grandmother through the window of a coffee house. I felt dumbstruck – she had passed away the year before. I looked intently for a brief period, then reminded myself it couldn't possibly be her.

I'd experienced analogous situations all through my life. From time to time, I "knew" someone I had never met. Sometimes I could rapidly pinpoint who the unfamiliar person resembled – such as my elderly relative. Other times, a face simply had a indistinct knowingness I couldn't place.

Examining the Variety of Face Identification Abilities

In recent times, I started wondering if others have these odd experiences. When I inquired my acquaintances, one mentioned she often sees individuals in random places who look familiar. Others sometimes confuse a unknown person or celebrity for someone they know in everyday existence. But some described nothing of the kind – they could readily identify 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 elderly relative that day – or some kind of brain malfunction? Scientific investigation 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 experience the same thing.

Grasping the Range of Facial Recognition Capacities

Scientists have developed many evaluations to measure the capacity to remember faces. There exists a extensive variety: at one end are exceptional facial identifiers, who recall faces they have seen only momentarily or a long time ago; at the other are people with face blindness, who often have difficulty to know kin, close friends and even themselves.

Some evaluations also measure 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 looked at the skill to remember a face, according to brain researchers. 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 vastly dissimilar abilities to remember old faces.

Taking Facial Recognition Evaluations

I felt intrigued whether these assessments would provide insight on why strangers look familiar. Was I someone who always remembers a face? I often recognize people more than they recall me, and feel disappointed – a sentiment that scientists say is typical for superior face rememberers. But maybe I over-recognize faces – to the extent that even some new faces look known.

I received several face identification tests. I completed them, feeling confused at times. In one, called the facial recall assessment, I had to look at grayscale photos of a face from three angles, then find it in lineups. During another test that instructed me to pick out famous people from a mix of photos, many of the faces felt at least recognizable, but I couldn't quite place them – reminiscent to my everyday experience.

I felt doubtful about my outcome. But after assessment of my performance, I had properly distinguished 96% of the celebrity faces. The finding was that I qualified as a "near-exceptional facial identifier".

Understanding Incorrect Identification Rates

I also performed well in the previously seen/unfamiliar faces task, which was described as especially effective for evaluating someone's recall for faces. The test-taker looks at a sequence of 60 black-and-white photos, each of a different face. Then they review a string of 120 comparable photos – the initial collection plus 60 unknown visages – and identify which were in the initial group. The exceptional facial identifier benchmark is roughly 80%; I remembered 78% of the faces I'd seen. On the other side of the continuum, people with facial agnosia properly recognize an average of 57%.

I felt satisfied with my score, but also taken aback. I remembered many of the old faces, but infrequently mistook a new face for one that I'd seen before. My score on this indicator, called the mistaken recognition percentage, was 18%. Typical rememberers, super-recognizers and prosopagnosics all have a false alarm rate of about 30% on average. So why was I mistaking a unfamiliar individual's face for my elderly relative's?

Investigating Plausible Reasons

It was suggested that I likely possessed some exceptional facial identifier capacities. Everyone has a inventory of the faces we know in our recall, but super-recognizers – and likely almost superior rememberers like me – have a comparatively extensive and high-resolution catalogue. We're also probably to individuate faces – that is, assign characteristics to each face, such as approachability or rudeness. Studies suggests that the second aspect helps people to acquire and store faces to enduring recollection. While individuating may help me recognize people, it may also deceive me into seeing my elderly relative in a woman who has a analogous presence.

In furthermore, it was thought I might be "an active face perceiver", meaning I pay a significant focus 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 inclined to notice the stranger who resembles my grandmother. Indeed, one friend who said she doesn't make person recognition mistakes admitted she doesn't really look at the people around her.

Researching 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 "recognize" strangers. Examining further, I read about a disorder called over-familiarity with countenances (HFF), in which unfamiliar faces appear recognizable. Initially, this sounded like it could apply to me. But the handful of documented instances all took place after a physical event such as a seizure or cerebral accident, unlike the quirk that I've been noticing my whole mature years.

Through scientific platforms, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of person recognition problems, including visual distortions, like when faces appear to be dissolving. Researchers study many of these people, using methods like the previously seen/unfamiliar faces task and the facial recall assessment.

Experts have heard from only a handful 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 continuum, with some people who think each countenance is recognizable, and others, like me, who only experience it a several occasions a month.

{Understanding