After Juan was bitten by a German Shepherd, he feared all dogs. What, in terms of classical conditioning does Juan's fear of all dogs illustrate? How can Juan be unconditioned?

generalization; extinction

Explanation:

Stimulus generalization: In psychology, the term stimulus generalization is one of the parts in the classical conditioning theory which was introduced by Ivan Pavlov, and is defined as the propensity of a conditioned stimulus or CS to trigger an exact response once the response is being conditioned.

Extinction: In psychology, the term extinction refers to the slow weakening of a conditioned response that leads to disappear or decrease the onset of a particular behavior.

In the question above, Juan's fear of all dogs illustrates generalization and Juan can be unconditioned through the process of extinction.