Answer: stimulus generalization.
Explanation:
Stimulus generalization can happen in classical conditioning as well as in operant conditioning. When it´s in operant conditioning, stimulus generalization describes the way people learn something in a specific situation and then can apply it to different but similar circumstances.
In this example, Jessi first learned at preschool that to get a snack she has to wash her hands. Instead of having to relearn this practice at home, she applied the same rule she had already learned.