Katherine's dog used to drool when he heard her go to the food cupboard. Recently, Katherine has begun to take a plate from the cupboard before going to get the food. Her dog now drools when she goes to the plate cupboard. This is an example of:.

Higher order conditioning

Explanation:

Higher order conditioning refers to a situation in which a stimulus that was previously neutral is paired with a conditioned stimulus. Katherine's dog made use of higher order conditioning.

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