The fact that the horse Clever Hans was able to tap out the correct answer (with his hoof) to basic math problems is generally attributed to ________.
A) Hans' genius ability
B) unique learning techniques
C) experimenter expectancy effects
D) reasons that are still not fully understood

Question

Quizplus · Accepted Answer

The Clever Hans effect refers to the phenomenon where a horse named Clever Hans appeared to be able to perform arithmetic, albeit it was later discovered that Hans was simply responding to cues from his handler and experimenter expectancy effects were at play.

The Fact That the Horse Clever Hans Was Able to Tap