uncanny valley
C2Formal/Academic/Technical; also common in informed journalism and pop culture discussions.
Definition
Meaning
A concept in robotics and computer graphics describing the point at which a humanoid object (robot, CGI character) appears almost, but not perfectly, human, causing a strong sense of unease, eeriness, or revulsion in the observer.
Metaphorically extended to any situation where something is very close to perfect imitation of a natural or expected state, yet the slight discrepancy creates discomfort, distrust, or a negative emotional response (e.g., in animation, voice synthesis, virtual influencers, or even in social interactions).
Linguistics
Semantic Notes
A compound noun, typically used with the definite article 'the' (e.g., 'falls into the uncanny valley'). The 'valley' refers to a dip in a graph plotting emotional response against human likeness.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or grammatical differences. The term is used identically in both varieties.
Connotations
Identical technical and metaphorical connotations. Slightly more frequent in American media due to larger tech/entertainment industries discussing it.
Frequency
Low frequency in general discourse, but comparable in relevant technical/academic fields in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] falls into/avoids the uncanny valley.The [noun] creates/triggers an uncanny valley effect.It's deep in the uncanny valley.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[to be] on the wrong side of the valley”
- “a valley of unease”
Usage
Context Usage
Business
Rare, except in tech/product design discussing user acceptance of humanoid interfaces or virtual assistants.
Academic
Common in robotics, computer graphics, psychology, and media studies papers.
Everyday
Used by enthusiasts discussing films, video games, or AI, but not in casual conversation.
Technical
Core term in CGI, animatronics, and human-robot interaction research.
Examples
By Part of Speech
verb
British English
- The animators worked hard not to uncanny-valley the protagonist.
- This new model absolutely uncanny-valleys me.
American English
- The new CGI risked uncanny-valleying the entire audience.
- That avatar totally uncanny-valleys.
adverb
British English
- The face moved uncanny-valley-ly.
- He smiled uncanny-valley-ishly.
American English
- It stared back uncanny-valley-ly.
- The voice sounded uncanny-valley-ishly close to human.
adjective
British English
- The film suffered from an uncanny-valley antagonist.
- He has an uncanny-valley quality about his smile.
American English
- It was an uncanny-valley experience.
- She found the robot's gaze deeply uncanny-valley.
Examples
By CEFR Level
- Some video game characters look strange because of the uncanny valley.
- The robot's face was scary; it was in the uncanny valley.
- The filmmakers avoided the uncanny valley by making the animated characters more cartoon-like.
- Many people feel uneasy when a robot enters the uncanny valley.
- Despite advances in rendering, the latest virtual influencer still falls into the uncanny valley for many viewers, undermining its intended relatability.
- The psychological mechanisms behind the uncanny valley effect are thought to involve cognitive dissonance and threat detection.
Learning
Memory Aids
Mnemonic
Imagine a robot in a VALLEY saying 'I'm almost human!' — it's UNCANNY (strange) how close it is, making you want to leave the valley.
Conceptual Metaphor
HUMANLIKENESS IS A LANDSCAPE; DISCOMFORT IS A VALLEY (a dip in positive response).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation 'жуткая долина' as primary term; the established calque is 'зловещая долина' or the borrowed 'анканни-велли'.
- Do not confuse with 'долина странностей' — 'uncanny' here implies eeriness, not just oddity.
Common Mistakes
- Using it as an adjective alone (e.g., 'The robot is uncanny valley.' Incorrect; use '...is in the uncanny valley' or '...has an uncanny valley effect.').
- Misspelling as 'uncanny valley' without the article when referring to the concept.
- Applying it to things not attempting human likeness (e.g., a strange tree).
Practice
Quiz
In which field did the term 'uncanny valley' originate?
FAQ
Frequently Asked Questions
Coined in 1970 by Japanese roboticist Masahiro Mori (森政弘) as '不気味の谷' (bukimi no tani). He used it to describe the emotional response to increasingly human-like robots.
Yes, metaphorically. It's used for very realistic prosthetics, voice synthesis, and even for people or behaviours that seem almost normal but subtly 'off', causing social discomfort.
It is a widely observed hypothesis with substantial anecdotal and some empirical support in psychology and HCI studies, but the exact mechanisms and universality are still debated.
By either not attempting photorealism (opting for stylization) or by achieving such high fidelity in motion, texture, and expression that the likeness becomes indistinguishable from a real human, moving past the 'valley' on the graph.