Suppose that laboratory animals are taught that a tone predicts food delivery. Then, a light is added as a second CS and they are given additional trials paired with food. If the animals now are tested with the light alone, they will
a. salivate more to the light than when it was presented with the tone.
b. salivate equally to the light as they did to the tone.
c. salivate to the light, but less quickly than they did to the tone.
d. not salivate to the light.
Answer: d. not salivate to the light.
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