In classical conditioning, this term refers to the initial stage when we link a neutral stimulus and an unconditioned stimulus so that the neutral stimulus begins triggering the unconditioned response, making it the conditioned response. In operant conditioning, it is the strengthening of a reinforced response

acquisition

Explanation:

Acquisition refers to the initial stage when we link a neutral stimulus and an unconditioned stimulus so that the neutral stimulus begins triggering the unconditioned response, making it the conditioned response. In classical conditioning, acquisition is the first stage of learning, whereby the stimulus causes the conditioned response  In operant conditioning, it is the strengthening of a reinforced response.

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