Final answer:
Randall's behavior demonstrates stimulus discrimination, as he only removes his shoes at his grandmother's house, which acts as an excitatory stimulus for this particular behavior.
Step-by-step explanation:
In response to the question regarding Randall's behavior of taking his shoes off when he enters his grandmother's home, but not when entering other houses, we can analyze this behavior using concepts from psychology. Stimulus discrimination is evident here, as Randall only removes his shoes in the specific context of his grandmother's house, not generalizing this behavior to other homes.
While we don't have information about any punishment, the behavior suggests that entering his grandmother's house is an excitatory stimulus for the action of removing his shoes. Therefore, Randall has learned to discriminate between entering his grandmother's home and other houses as cues for when to remove his shoes.