Final answer:
The statement is False. An SΔ indicates that a response will not be reinforced, contrary to what the question suggests.
Step-by-step explanation:
The question refers to a concept in behavioral psychology, specifically within the domain of operant conditioning. The term SΔ (often denoted as S-delta) refers to a discriminative stimulus that signals the absence of reinforcement or punishment, setting the occasion upon which a response will not be reinforced. This is in contrast to SD, which sets the occasion for a response to be reinforced. Therefore, the given statement is False as an SΔ does not set the occasion upon which a response is reinforced; rather, it does the opposite by indicating that a response will not be followed by reinforcement.