Pavlov placed meat powder in the mouths of dogs, and they began to salivate. The food acted as a (an) ____________
a) unconditioned response
b) unconditioned stimulus
c) conditioned response
d) conditioned stimulus
ANS: B, The food acted as an unconditioned stimulus because it caused salivation without learning taking place. It's "automatic" ability to elicit a reaction makes it unconditioned.
Psychology
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