Clever Hans appeared to solve arithmetic and intellectual tasks, but Oskar Pfungst showed in 1907 that the horse was reading involuntary human cues, shaping research methodology.
Germany
Story
Clever Hans appeared to perform arithmetic, but Pfungst showed the horse was responding to unconscious human cues.
The case became a foundation for better experimental controls and the concept known as the Clever Hans effect.
Clever Hans is archived because the story changed how humans study animals and interpret animal intelligence.
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