What best describes the requirements of the Rescorla-Wagner model of classical conditioning?
a. The conditioned stimulus must follow the unconditioned stimulus in an unpredictable cycle of responses.
b. The conditioned stimulus and the unconditioned stimulus must be close in time and the conditioned stimulus must reliably predict the unconditioned stimulus.
c. The unconditioned stimulus must follow the conditioned stimulus within 0 to 15 seconds.
d. The conditioned stimulus must follow the unconditioned stimulus within 0 to 15 seconds and the conditioned stimulus must be unpredictable.
B
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