Quiz: Famous Experiments
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The Russian mathematician Ivan Pavlov found in 1901 that dogs who always heard a bell before food arrived would start salivating when they heard the bell, regardless of whether the food actually arrived or not.
Later, B.F. Skinner used rats to study if he could trigger not only a reflex, but a whole set of behaviors. He quickly taught his rats that when they pressed a lever, they were rewarded with food. He then taught them to press the lever three times to get food, and experimented with giving food at random intervals.
Which of the intervals gave the most lasting behavior?