Why "Uncanny Valley" Human Look-Alikes Put Us on Edge (2024)

The sensation may arise when the viewer's brain begins to consider an artificial figure as a possible human

When Pixar screened a computer-animated short film called "Tin Toy" in 1988, test audiences hated the sight of the pseudo-realistic baby named "Billy" who terrorized the toys. Such a strong reaction persuaded Pixar to avoid making uncannily realistic human characters — it has since focused its efforts on films about living toys, curious robots and talking cars to win Academy Awards and moviegoers' hearts.

Today, the "uncanny valley" phenomenon remains almost as mysterious as when Japanese roboticist Masahiro Mori first coined the term in 1970. But scientists have begun venturing deeper into the metaphorical valley to better understand why robots or virtual characters with certain human characteristics can trigger such mental uneasiness. That understanding may prove crucial as humanlike robots or virtual companions enter homes and businesses in coming years.

"We still don't understand why it occurs or whether you can get used to it, and people don't necessarily agree it exists," said Ayse Saygin, a cognitive scientist at the University of California, San Diego. "This is one of those cases where we're at the very beginning of understanding it."

The uncanny valley metaphor suggests that a human appearance or behavior can make an artificial figure seem more familiar for viewers — but only up to a point. The sense of viewer familiarity drops sharply into the uncanny valley once the artificial figure tries but fails to mimic a realistic human.

"If you look humanlike but your motion is jerky or you can't make proper eye contact, those are the things that make them uncanny," Saygin told InnovationNewsDaily. "I think the key is that when you make appearances humanlike, you raise expectations for the brain. When those expectations are not met, then you have the problem in the brain."

All too human
Saygin and fellow researchers don't think the phenomenon follows the valley metaphor exactly. Instead, they suggest the uncanny valley sensation arises when an artificial figure looks or behaves real enough to trigger a mental switchover — the viewer's brain suddenly begins to consider the figure as a possible human. The artificial figure almost inevitably fails such close inspection.

"Pixar took a lesson from 'Tin Toy,'" said Thalia Wheatley, a psychologist at Dartmouth College. "We have to nail the human form or not even go there."

Wheatley's lab has found that everyone from Dartmouth college students to a remote tribe in Cambodia shows a strong sensitivity to what does or does not appear human. But such findings held up only when the researchers showed people human faces that were familiar to their ethnic group.

When shown a series of doll-like and human faces made with "morphing" software, people said a face was more human than doll only if it had at least a 65 percent mix of a human face. People could even judge an artificial figure's human appearance based on seeing a single eye.

"Evolutionary history has tuned us to detect minor distortions that indicate disease, mental or physical problems," Wheatley explained. "To go after a human-looking robot or avatar is to go up against millions of years of evolutionary history."

When it matters
Today's world has gotten by without conquering the uncanny valley. Most people don't yet expect (or want) perfectly humanlike robot lovers, servants or virtual companions in their lives. But some cases already exist where a more humanlike artificial figure could prove helpful.

Medical students perform better in real-life emergencies if they trained with a simulator that appears and behaves like a real person, said Karl MacDorman, a robotics researcher at Indiana University. More ambitious Hollywood films that want to use computer-animated figures for real-life scenes could also benefit — whether they need a virtual stunt double or a realistic emotional performance to match the gravitas of films such as "Schindler's List."

"For medical applications or certain films, aiming for the first peak [of the uncanny valley] is not adequate," MacDorman said. "We really do need to overcome the uncanny valley."

Most experiments up until now have focused on studying the human perception of a "mismatch" in an artificial figure's human realism. But MacDorman has begun developing an interactive experiment that makes volunteers talk with either real actors or their digital doubles — a next step toward clearing the mists from the uncanny valley.

"We predict that uncanniness will interfere with participants' normal empathetic response within this scenario," MacDorman said. "This will help us understand how the uncanny valley influences emotional empathy during an interaction."

Copyright 2012 InnovationNewsDaily, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

ABOUT THE AUTHOR(S)

    Jeremy Hsu is a New York City–based writer who has contributed to publications such as Scientific American, IEEE Spectrum, Undark Magazine and Wired.

    Why "Uncanny Valley" Human Look-Alikes Put Us on Edge (2024)

    FAQs

    Why do humans have an uncanny valley response? ›

    There is also another theory that suggests Uncanny Valley is caused by an existential fear of being replaced by robots. This pairs with another idea that when we see a robot that looks just like us, but clearly isn't human, it causes a violation of our expectations or norms of what humans and robots look like.

    Does uncanny valley mean there were human like creatures at one point? ›

    The uncanny valley metaphor suggests that a human appearance or behavior can make an artificial figure seem more familiar for viewers — but only up to a point.

    What is the uncanny valley of human perception? ›

    The uncanny valley hypothesis predicts that an entity appearing almost human will risk eliciting cold, eerie feelings in viewers.

    What is the uncanny valley human evolution? ›

    Scientists have identified mechanisms in the human brain that could help explain the phenomenon of the 'Uncanny Valley' – the unsettling feeling we get from robots and virtual agents that are too human-like. They have also shown that some people respond more adversely to human-like agents than others.

    Do animals feel the uncanny valley? ›

    Very humanlike artificial agents can induce feelings of uneasiness in human perceivers. Stimuli that generate this response are said to occupy “the uncanny valley”. Given inconsistent findings in the literature, whether or not nonhuman animals experience the uncanny valley is unclear.

    Why are some people not affected by the uncanny valley? ›

    Two possible reasons could explain why the uncanny valley effect was absent in children with ASD: one is that they could not detect the perceptual mismatch features (i.e., the enlarged eyes on faces) and the changes of the realism on the faces, the other is that they were indifferent to these features or changes even ...

    What is an example of uncanny valley human? ›

    An industrial robot has little human likeness and therefore generates little affinity in observers. A toy robot, on the other hand, has a more human likeness and tends to be more appealing. A prosthetic hand, he noted, tends to lie in this uncanny valley—it can be highly lifelike yet generates feelings of unease.

    Do cats experience uncanny valley? ›

    While the uncanny valley is usually used to describe the appearance of still objects, like dolls, says McAndrew, the cats in Cats have the added element of movement. “However, the cats are constantly in motion, mimicking a wide range of human qualities such as facial expressions and emotion,” he says.

    What is the fear of the uncanny valley called? ›

    Automatonophobia is a specific phobia, which is an irrational fear of something that actually isn't dangerous. 1 While it is relatively common to feel nervous around human-like figures (a phenomenon called the uncanny valley),2 a phobia disrupts a person's life.

    What part of the brain is the uncanny valley? ›

    Brain scans revealed that activity in the ventromedial prefrontal cortex, or VMPFC — a region involved in making value judgments — mirrored participants' uncanny valley reactions. VMPFC activity was typically higher in response to more humanlike pictures, but dipped in response to artificial humans.

    What is the Uncanny Valley Corpse theory? ›

    Mortality salience: According to this hypothesis, the Uncanny Valley is a reminder of one's own death. “A dead person's face may indeed be uncanny: it loses color and animation with no blinking,” Masahiro Mori wrote, adding that a “troubled” dead person's face is even more uncanny.

    Why is uncanny valley so unsettling? ›

    The uncanny valley is the negative feeling that people feel when a robot, AI, or imperfect human replica is extremely similar to a human but different in an unsettling way. As the technology behind robotics and ai increases, the similarity between humans and your creations continues to increase.

    Does the uncanny valley only apply to robots? ›

    The uncanny valley doesn't only happen with robots that adopt a human form.

    What is the uncanny valley with babies? ›

    The 'uncanny valley' response is a phenomenon involving the elicitation of a negative feeling and subsequent avoidant behaviour in human adults and infants as a result of viewing very realistic human-like robots or computer avatars.

    What is uncanny valley autism? ›

    The "uncanny valley effect" is a way to understand people's reactions to "hidden" or "masked" autism and how "coming out" helps. When people do not know someone is diagnosed with autism, they may react to atypical behaviors with discomfort or even revulsion.

    Is the uncanny valley a fear of death? ›

    Finally, Mori suggested a possible reason for the uncanny valley effect: He placed corpses and zombies at the bottom of the valley on the graph, and suggested that we experience unease at not-quite-accurate human simulations because they remind us of corpses and we naturally fear death.

    Is the uncanny valley an evolutionary trait? ›

    The work, according to its authors, is significant because it indicates that there is a biological basis for the uncanny valley and supports theories that propose that the brain mechanisms underlying the uncanny valley are evolutionary adaptations.

    Is Shrek uncanny valley? ›

    He continues: "One of the most well known modern examples of this was actually an early test screening of Shrek in 2000, where Fiona was rendered as very hyper-realistic, so realistic that it surpassed the threshold of comfort and cartoon and moved into the 'uncanny valley'.

    Do autistic people feel the uncanny valley? ›

    Although the results of this study did not support the claim that individuals with ASD do not experience the uncanny valley differently than typically developed individuals, there were significant enough results to conclude that different levels of empathy may account for individual differences in the uncanny valley.

    Can the uncanny valley be overcome? ›

    "A good way to avoid the uncanny valley is to move a character's proportions and structure outside the range of 'human. ' One reason Gollum was so successful is that he has big eyes, and the shape of his face is not quite human. Grendel in Beowulf is also disfigured and deformed.

    How did Avatar avoid the uncanny valley? ›

    Avatar, released in 2009, avoided the uncanny valley by creating a new species which had human traits but definitely weren't human. A decade later and the technology at our fingertips has advanced significantly.

    What is the uncanny valley simply psychology? ›

    The uncanny valley is the hypothesized relationship between the extent to which a humanoid resembles an actual human and the negative emotional response such a humanoid evokes.

    Is Polar Express uncanny? ›

    The Polar Express exhibits a classic example of what is called 'the uncanny valley. ' The uncanny valley is a theory exploring the relationship between artificial resemblance to humans and humans' reactions to those similarities.

    How does Freud define uncanny? ›

    This, for Freud, is the uncanny—it is the dread we feel in situations in which our childish fantasies and fears appear more real and more true than our adult worldviews. If we have this idea in mind, the difference between familiar things that delight us and familiar things that terrify us start to make sense.

    Have cats got a sixth sense? ›

    Many people throughout history have believed cats to have some kind of extra-sensory perception, or sixth sense. In reality, this is probably because cats' senses are so much better than ours. Cats can pick up on sounds or vibrations that completely pass us by, or can sense them long before we do.

    Do cats think we are like them? ›

    Cats do often treat humans like other felines, using gestures like licking or rubbing on both feline friends and human caregivers, she says. “In a way, cats think of us as bigger cats,” Bonk says. “They might not necessarily know that we're a different species or they just don't care.”

    Do monkeys fall in the uncanny valley? ›

    The visual behavior of monkeys falls into the uncanny valley just the same as human visual behavior (2, 3). Thus, these data demonstrate that the uncanny valley effect is not unique to humans, and that evolutionary hypotheses regarding its origins are tenable.

    Is pediophobia real? ›

    Pediophobia is a fear of dolls or inanimate objects that look real, and pedophobia is a fear of actual children. People can suffer from both phobias, so someone who fears children (pedophobia) may also fear the childlike features of dolls (pediophobia), and someone with pediophobia may also have pedophobia.

    Is Megalophobia a real thing? ›

    Megalophobia is a type of anxiety disorder in which a person experiences intense fear of large objects. A person with megalophobia experiences intense fear and anxiety when they think of or are around large objects such as large buildings, statues, animals and vehicles.

    Does Megalophobia exist? ›

    If the thought of or encounter with a large building, vehicle, or other object causes intense anxiety and fear, you may have megalophobia. Also known as a “fear of large objects,” this condition is marked by significant nervousness that is so severe, you take great measures to avoid your triggers.

    Where did the uncanny valley evolve from? ›

    The hypothesis originated in a 1970 essay by Japanese roboticist Masahiro Mori, in which he proposed that as human likeness increases in an object's design, so does one's affinity for the object—but only to a certain point.

    Who created the uncanny? ›

    One hundred years ago, Sigmund Freud wrote his paper on 'The Uncanny' (Das Unheimliche). His theory was rooted in everyday experiences and the aesthetics of popular culture, related to what is frightening, repulsive and distressing.

    Are clowns in the uncanny valley? ›

    That has led some people to speculate that clowns are creepy because they fall into what's known as the uncanny valley, a not-quite-human appearance often ascribed to robots. The idea is that we like and feel empathy for robots that look somewhat human-like (think C-3P0), but are repulsed by those that look too human.

    What are the roots of uncanny? ›

    Uncanny has its origins in a word used in northern and Scottish English: 'canny' meaning smart or careful, preceded by the prefix 'un' which means 'not'. Uncanny entered mainstream usage in the late 19th century, to refer to a situation that appears odd.

    Is the uncanny valley ableist? ›

    The uncanny, as Freud and others defined and applied it, is an explicitly ableist concept. Knowing that Sigmund Freud first published this essay as “Das Unheimliche” in German in 1919, he is concerned with its etymology in German in a way that is untranslatable.

    How do I get rid of uncanny valley? ›

    How to Avoid the Uncanny Valley in Your Art
    1. Strive to use natural human proportions as much as possible. As a default, you should always use correct proportions when modeling your human figures. ...
    2. Avoid atypicality at higher levels of realism.
    3. Avoid “dead eyes” at all costs.

    What is the uncanny valley special effects? ›

    If you're not familiar with the concept, it's essentially when the sight of a human-like character triggers a feeling of unease, disgust, or fear. When the uncanny valley effect is created intentionally — let's say for a sci-fi or horror film — it can evoke a strong (and desired) emotional response from your viewers.

    How long does it take to complete uncanny valley? ›

    When focusing on the main objectives, Uncanny Valley is about 1½ Hours in length. If you're a gamer that strives to see all aspects of the game, you are likely to spend around 4 Hours to obtain 100% completion.

    What is the uncanny valley effect on children? ›

    The results showed that children do experience uncanniness in human-like virtual characters, perceived as stranger, less friendly, and less human-like than humans. This perception of the uncanny was exaggerated further in human-like characters with aberrant facial expression.

    Why do autistic kids like anime? ›

    People with autism also often have “special interests” that they focus on and want to share with other people. I believe most autistic people like anime because it often exaggerates the characters, making their intentions very clear and not leaving anything out.

    What Disney animation is about autism? ›

    Life, Animated is based on journalist Ron Suskind's 2014 book Life, Animated: A Story of Sidekicks, Heroes, and Autism, which tells the story of his son, Owen Suskind, who struggled with autism and learned how to communicate with the outside world through his love of Disney films.

    Why is it the autism creature? ›

    The origin of the term "Autism Creature" is unknown, but it is believed to have been coined by members of the autism community as a way to describe their experiences with autism. The metaphorical creature represents the unique characteristics and behaviors that individuals with autism exhibit.

    What is the point of the uncanny valley? ›

    Mori coined the term “uncanny valley” to describe his observation that as robots appear more humanlike, they become more appealing—but only up to a certain point. Upon reaching the uncanny valley, our affinity descends into a feeling of strangeness, a sense of unease, and a tendency to be scared or freaked out.

    Is the uncanny valley because of corpses? ›

    Finally, Mori suggested a possible reason for the uncanny valley effect: He placed corpses and zombies at the bottom of the valley on the graph, and suggested that we experience unease at not-quite-accurate human simulations because they remind us of corpses and we naturally fear death.

    What is the purpose of the uncanny? ›

    Basically, the Uncanny is what unconsciously reminds us of our own Id, our forbidden and thus repressed impulses – especially when placed in a context of uncertainty that can remind one of infantile beliefs in the omnipotence of thought.

    What is the uncanny valley simplified? ›

    The uncanny valley is a phenomenon in which a human being experiences a negative emotional response to a non-human figure, object, or entity that possesses a human likeness. The underlying idea is that humans are comfortable with other human-like objects or entities up until a certain point.

    What is the fear of the uncanny? ›

    This, for Freud, is the uncanny—it is the dread we feel in situations in which our childish fantasies and fears appear more real and more true than our adult worldviews. If we have this idea in mind, the difference between familiar things that delight us and familiar things that terrify us start to make sense.

    Do monkeys experience the uncanny valley? ›

    2B), monkeys exhibited one pattern consistently: They preferred to look at unrealistic synthetic faces and real faces more than to realistic synthetic faces. The visual behavior of monkeys falls into the uncanny valley just the same as human visual behavior (2, 3).

    What is it called when things look human but aren t? ›

    The uncanny valley is a term used to describe the relationship between the human-like appearance of a robotic object and the emotional response it evokes.

    Can uncanny be positive? ›

    If something is uncanny, it is so mysterious, strange, or unfamiliar that it seems supernatural. If you hear strange music echoing through your attic, you might refer to it as positively uncanny.

    What does the likeness is uncanny mean? ›

    : strange or unusual in a way that is surprising or difficult to understand. She had an uncanny resemblance to someone I had seen before.

    What does Freud argue in the uncanny? ›

    Freud's general thesis: The uncanny is anything we experience in adulthood that reminds us of earlier psychic stages, of aspects of our unconscious life, or of the primitive experience of the human species.

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