Harmony notices that her cat salivates as soon as it hears the sound of Harmony opening a can with an electric can opener. In this example, the is the conditioned stimulus, while is the conditioned response.

The answer is the sound of the can opener and the salivation, respectively.

Explanation:

In classical conditioning, a conditioned stimuls (the sound of the can opener) is associated with an unrelated consequence, called unconditioned stimuls (the food). This produces a reaction known as conditioned response (the salivation).

It's important to recognise that any neutral stimulus can become conditioned when constantly followed by a consequence. In the example, the sound of the can opener could be replaced by a bell, and in time would produce the same response.

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