Final answer:
A Fixed Interval Schedule reinforces the first response after a set period of time, resulting in a 'scallop-shaped' response pattern with pauses post-reinforcement. Slot machines use a Variable Ratio Schedule, which rewards after an unpredictable number of responses and is highly resistant to extinction.
Step-by-step explanation:
The schedule of reinforcement where an organism is reinforced for the first response following a designated period of time is known as the Fixed Interval Schedule. This schedule yields a characteristic 'scallop-shaped' response pattern, where there tends to be a significant pause following the reinforced response. An example of this would be a patient receiving pain relief medication at set time intervals, regardless of how many times they may request it within that interval. On the contrary, slot machines operate on a Variable Ratio Schedule, providing reinforcement after an unpredictable number of responses, which is why it is commonly associated with high and steady response rates, and is very resistant to extinction.