Binet came to regard __________ as the "cholera" of psychology.
A) deception by the subjects in experiments
B) insufficient quantification of experimental results
C) insufficiently large samples of subjects
D) unintentional suggestion

Question

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Binet believed that unintentional suggestion (i.e. unintentionally leading subjects to respond in a certain way due to the experimenter's behavior or language) could contaminate experimental results and make them unreliable. He likened this to cholera, a deadly epidemic disease that can spread quickly and contaminate large populations.

Binet Came to Regard __________ as the "Cholera" of Psychology