Final answer:
Generalizing behavior involves training an animal to exhibit a behavior consistently under different conditions. Discrimination is not one of the variables affecting generalizing behavior, while duration, distraction, and diversity are.
Step-by-step explanation:
Generalizing behavior refers to the ability to perform a behavior in different situations. It involves training an animal to exhibit a behavior consistently under various conditions.
Out of the given options, discrimination does not belong to the variables affecting generalizing behavior. Discrimination refers to the ability to differentiate between two or more stimuli or situations, which is a separate skill from generalizing behavior.
On the other hand, duration, distraction, and diversity are all variables that can affect how an experiential factor is likely to influence an animal's behavior.