Compare multielement designs and changing-criterion designs and identify which statement correctly differentiates them.

Compare multielement designs and changing-criterion designs and identify which statement correctly differentiates them.

• A. The changing-criterion design compares multiple conditions in a quick, randomized order.
• B. The multielement design gradually shifts the reinforcement criterion across phases.
• C. Multielement designs compare two or more conditions rapidly in a randomized sequence.
• D. Changing-criterion designs hold reinforcement criteria constant across phases.

Answer: (C)

The main idea being tested is how these two design types manipulate reinforcement conditions over time and how that shapes what they are best at demonstrating. In a multielement design, you present two or more conditions in rapid, alternating sequence within the same study, often with the order randomized. This lets you compare the effects of each condition quickly and directly within the same subject, helping to see which condition produces the desired behavior without waiting for long changes to accumulate. In contrast, a changing-criterion design involves systematically shifting the reinforcement criterion across successive phases. The target behavior is shaped by gradually increasing or decreasing the requirement for reinforcement, not by switching between multiple conditions rapidly. Thus, the statement that multielement designs compare two or more conditions rapidly in a randomized sequence is the best fit, because it captures the core feature of multielement designs—the rapid, randomized comparison of multiple conditions within the same subject. The other statements mix up the characteristics: changing-criterion designs do not focus on rapid randomized condition comparisons, and multielement designs do not involve gradually shifting reinforcement criteria across phases, while changing-criterion designs do.

The main idea being tested is how these two design types manipulate reinforcement conditions over time and how that shapes what they are best at demonstrating. In a multielement design, you present two or more conditions in rapid, alternating sequence within the same study, often with the order randomized. This lets you compare the effects of each condition quickly and directly within the same subject, helping to see which condition produces the desired behavior without waiting for long changes to accumulate.

In contrast, a changing-criterion design involves systematically shifting the reinforcement criterion across successive phases. The target behavior is shaped by gradually increasing or decreasing the requirement for reinforcement, not by switching between multiple conditions rapidly.

Thus, the statement that multielement designs compare two or more conditions rapidly in a randomized sequence is the best fit, because it captures the core feature of multielement designs—the rapid, randomized comparison of multiple conditions within the same subject. The other statements mix up the characteristics: changing-criterion designs do not focus on rapid randomized condition comparisons, and multielement designs do not involve gradually shifting reinforcement criteria across phases, while changing-criterion designs do.