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During my mid-20s, I observed my grandmother through the pane of a coffee shop. I felt stunned – she had died the prior year. I gazed for a short time, then remembered it couldn't be her.

I'd had similar situations throughout my life. From time to time, I "knew" a person I was unacquainted with. Occasionally I could rapidly identify who the unknown individual reminded me of – such as my grandma. In other instances, a countenance simply had a vague familiarity I couldn't identify.

Investigating the Variety of Face Identification Capabilities

Lately, I became curious if others have these peculiar situations. When I questioned my companions, one said she often sees individuals in random places who look known. Others occasionally mistake a stranger or celebrity for someone they know in real life. But some described nothing of the kind – they could readily identify people they'd met and people they hadn't.

I felt fascinated by this spectrum of responses. Was it just desire that made me see my elderly relative 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 err sometimes? I was commencing to comprehend that we can all see the same face but not perceive the same thing.

Grasping the Spectrum of Face Identification Abilities

Investigators have created many tests to measure the skill to recall faces. There exists a extensive variety: 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 have difficulty to identify relatives, dear acquaintances and even themselves.

Some evaluations also capture how good someone is at recognizing if they have not seen a face before. This is where I believe I am deficient. But researchers "haven't thoroughly investigated this" as much as they've examined the ability to remember a face, according to brain researchers. It does seem that the two capabilities use different brain functions; for example, there is indication that super-recognizers and prosopagnosics do about as well as each other at identifying new faces, despite their wildly different abilities to recall old faces.

Undergoing Face Identification Evaluations

I felt intrigued whether these tests would provide insight on why unfamiliar individuals look familiar. Was I someone who always remembers a face? I often remember people more than they recall me, and feel let down – a emotion that researchers say is common for super-recognizers. But maybe I excessively identify faces – to the point that even some new faces look recognizable.

I was sent several facial recognition tests. I waded through them, feeling confused at times. In one, called the facial recall assessment, I had to look at monochrome photos of a face from different viewpoints, then find it in groups. During another test that told me to pick out famous people from a mix of photos, many of the faces felt at least known, but I couldn't quite place them – comparable to my actual experience.

I felt less than confident about my performance. But after assessment of my results, I had accurately recognized 96% of the celebrity faces. The finding was that I qualified as a "near-exceptional facial identifier".

Comprehending Mistaken Recognition Percentages

I also excelled in the known/unknown countenances task, which was described as especially effective for assessing someone's memory for faces. The participant looks at a sequence of 60 monochrome photos, each of a different face. Then they examine a sequence of 120 comparable photos – the initial collection plus 60 unknown visages – and identify which were in the first set. The superior face rememberer threshold is roughly 80%; I remembered 78% of the faces I'd seen. On the other end of the range, people with facial agnosia accurately identify an average of 57%.

I felt pleased with my result, but also taken aback. I recalled many of the old faces, but seldom misidentified a unknown visage for one that I'd seen before. My result on this indicator, called the incorrect identification frequency, was 18%. Typical rememberers, superior face rememberers and face-blind individuals all have a false alarm rate of about 30% on average. So why was I confusing a unknown person's face for my grandmother's?

Investigating Potential Explanations

It was theorized that I likely possessed some exceptional facial identifier capacities. Everyone has a catalogue of the faces we know in our memory, but superior face rememberers – and likely near-exceptional individuals like me – have a fairly substantial and high-resolution catalogue. We're also probably to distinguish countenances – that is, attribute characteristics to each face, such as approachability or rudeness. Research suggests that the second aspect helps people to acquire and store faces to permanent recall. While differentiating may help me recognize people, it may also mislead me into seeing my grandma in a woman who has a analogous presence.

In addition, it was thought I might be "a attentive countenance examiner", meaning I pay a considerable notice to faces. Others may have more mistaken recognition moments, thinking they recognize someone they don't know. But because I tend to look attentively at faces, I am prone to notice the unfamiliar individual who resembles 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.

Investigating Excessive Recognition 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 "recognize" 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 few of reported cases all took place after a medical episode such as a convulsion or brain attack, unlike the peculiarity that I've been experiencing my whole grown-up existence.

Through scientific platforms, experts have heard from about 24,000 prosopagnosics, as well as people with all kinds of face identification problems, including perceptual alterations, like when faces appear to be melting. Researchers study many of these people, using tools like the previously seen/unfamiliar faces task and the Cambridge Face Memory Test.

Experts have heard from only a few of people with possible HFF in long durations of research.

"The occurrence rate is quite low," one expert said of HFF. However, they speculated that there may be a spectrum, with some people who think all visages is recognizable, and others, like me, who only encounter it a several occasions a month.

{Understanding