Response generalization occurs when a learner emits varied but functionally equivalent responses to a single stimulus or stimulus class even though only one response was directly taught In this scenario the single stimulus picture of an acoustic guitar evokes multiple related responses string instrument folk instrument beyond the initially taught response guitar This phenomenon is characterized by multiple responses occurring to a single stimulus This contrasts with stimulus generalization where a single response is emitted across a range of different but similar stimuli Maintenance refers to the continued performance of a learned behavior after intervention has ceased which is not the primary focus here Response differentiation is the process of reinforcing only those responses that meet a specific criterion leading to a more precise or specific response which is the opposite of what is observed here as the responses are expanding not narrowing The text provides a clear analogy with the yoyo trick teaching walk the dog and then the learner performing around the world and cats cradle with the same yoyo demonstrating multiple responses to a single stimulus which is the definition of response generalization