In my young adulthood, I observed my grandma through the window of a coffee house. I felt stunned – she had departed the year before. I stared for a brief period, then remembered it couldn't possibly be her.
I'd encountered similar experiences all through my life. From time to time, I "recognized" a person I didn't know. Sometimes I could quickly pinpoint who the unknown individual reminded me of – like my grandma. On other occasions, a face simply had a vague familiarity I couldn't identify.
Recently, I became curious if different individuals have these unusual experiences. When I asked my companions, one said she frequently sees people in random places who look known. Others sometimes confuse a stranger or celebrity for someone they know in everyday existence. But some mentioned no such experiences – they could effortlessly recognize people they'd met and people they hadn't.
I felt intrigued by this spectrum of responses. Was it just yearning that made me see my elderly relative that day – or some kind of mental glitch? Scientific investigation has found we spend about a quarter-hour of every hour looking at faces – do we just err sometimes? I was commencing to comprehend that we can all see the same face but not interpret the same thing.
Researchers have designed many assessments to assess the skill to recall faces. There exists a broad spectrum: at one end are superior face rememberers, who recognize faces they have seen only for a short time or a considerable time past; at the other are people with prosopagnosia, who often have difficulty to know relatives, close friends and even themselves.
Some evaluations also measure how proficient someone is at telling if they have not seen a face before. This is where I suspect I have limitations. But researchers "haven't extensively researched this" as much as they've looked at the skill to recognize a face, according to cognitive neuroscientists. It does seem that the two skills use distinct brain mechanisms; for instance, there is indication that superior face rememberers and those with facial agnosia do about as well as each other at recognizing new faces, despite their wildly different abilities to recognize old faces.
I felt curious whether these assessments would shed some light on why unknown people look familiar. Was I someone who never forgets a face? I often remember people more than they recall me, and feel disappointed – a emotion that experts say is common for super-recognizers. But maybe I hyper-recognize faces – to the extent that even some new faces look known.
I obtained several face identification tests. I waded 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 multiple perspectives, then find it in arrays. During another test that directed me to pick out public figures from a mix of photos, many of the faces felt at least recognizable, but I couldn't exactly identify them – comparable to my actual experience.
I felt doubtful about my performance. But after analysis of my results, I had accurately recognized 96% of the celebrity faces. The determination was that I qualified as a "near-exceptional facial identifier".
I also excelled in the known/unknown countenances task, which was described as particularly good for assessing someone's recognition for faces. The participant looks at a collection of 60 grayscale photos, each of a different face. Then they examine a series of 120 analogous photos – the original series plus 60 new faces – and indicate which were in the initial group. The super-recognizer threshold is roughly 80%; I remembered 78% of the faces I'd seen. On the other end of the range, people with facial agnosia correctly guess an average of 57%.
I felt pleased with my score, but also astonished. I recalled many of the old faces, but rarely mistook a unknown visage for one that I'd seen before. My score on this indicator, called the incorrect identification frequency, was 18%. Normal recognizers, super-recognizers and those with facial agnosia all have a mistaken recognition percentage of about 30% on average. So why was I confusing a stranger's face for my elderly relative's?
It was proposed that I probably possessed some exceptional facial identifier capabilities. Everyone has a inventory of the faces we know in our recall, but super-recognizers – and likely near-exceptional individuals like me – have a relatively large and high-resolution catalogue. We're also probably to distinguish countenances – that is, assign characteristics to each face, such as amiability or rudeness. Research suggests that the latter helps people to develop and retain faces to permanent recall. While differentiating may help me recognize people, it may also mislead me into seeing my grandmother in a woman who has a comparable demeanor.
In moreover, it was believed I might be "an active face perceiver", meaning I pay a considerable notice to faces. Others may have more incorrect identification moments, thinking they identify someone they don't know. But because I tend to look closely at faces, I am disposed to notice the unfamiliar individual who similar to my grandmother. Indeed, one acquaintance who said she doesn't make facial recognition mistakes acknowledged she doesn't really look at the people around her.
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" unknown people. Investigating further, I read about a disorder called over-familiarity with countenances (HFF), in which unfamiliar faces appear familiar. Superficially, this sounded like it could pertain to me. But the few of recorded occurrences all happened after a medical episode such as a seizure or cerebral accident, unlike the quirk that I've been observing my whole grown-up existence.
Through investigative websites, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of face identification problems, including visual distortions, like when faces appear to be liquefying. Researchers study many of these people, using methods like the old/new faces task and the memory for faces evaluation.
Experts have heard from only a few of people with suspected HFF in long durations of study.
"The prevalence is quite low," one expert said of HFF. However, they theorized that there may be a range, with some people who think each countenance is known, and others, like me, who only experience it a few times a month.
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