If a dog that has been classically conditioned to salivate when shown a square does not salivate when shown a triangle, what does the dog's behaviour illustrate?

Question

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The dog's behavior illustrates stimulus discrimination, which is the ability to differentiate between stimuli and respond differently to each one. In this case, the dog has learned to associate salivating with the square, but not with the triangle, indicating that it perceives the two shapes as distinct stimuli.

If a Dog That Has Been Classically Conditioned to Salivate