In the Past, Every Time a Rat Has Pressed a Lever

question 38

Multiple Choice

In the past, every time a rat has pressed a lever it has received a piece of food. The rat's rate of pressing has reached a high level. What procedure would produce extinction of the response?

• A) Give the rat a shock for pressing the lever.
• B) Present the food repeatedly by itself, when the rat is in a cage without the lever.
• C) Let the rat press the lever many times without receiving food.
• D) Allow a long time to pass during which the rat has no opportunity to practice the response.

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