In an experiment by Dickinson, Balleine, Watt, Gonzalez, and Boakes (1995), hungry rats were trained to press a lever to obtain food pellets. Some rats were then given the same pellets while still under high food deprivation (groups High/High and High/Low) while other rats received the free food pellets under low food deprivation conditions (groups Low/High and Low/Low). All rats were then tested to see how much they would press the lever either while hungry (groups High/High and Low/High) or not hungry (groups High/Low and Low/Low). Which group pressed the lever the least?
a. High/High
b. High/Low
c. Low/High
d. Low/Low
Ans: d
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