Multiple Choice
What was Oskar Pfungst's evidence that Clever Hans was not doing math?
A) Hans answered correctly only when the questioner made certain sounds.
B) Hans answered correctly only when the questioner stood in plain sight.
C) Hans answered correctly only when his trainer, Mr. von Osten, was present.
D) Hans answered correctly on some days and not others.
Correct Answer:
Verified
Correct Answer:
Verified
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