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Results

#1. A BCBA is implementing a changing criterion design to systematically increase the number of independent work tasks a client completes each hour. The criterion is initially set at 2 tasks per hour and is then sequentially increased to 4, 6, and finally 8 tasks per hour. To demonstrate experimental control within this design, what must be observed regarding the client’s behavior?

The client’s completion of independent work tasks shows a general upward trend over the entire intervention period.

The client’s completion of independent work tasks consistently occurs drastically above or significantly below the current criterion level.

The client’s completion of independent work tasks changes in a concurrent and systematic fashion, matching each successive change in the criterion.

The client’s completion of independent work tasks demonstrates significant variability, with both increases and decreases occurring irrespective of the criterion changes.

In a changing criterion design experimental control is demonstrated when the clients behavior closely matches or tracks the changing criterion levels This means that as the criterion for the target behavior eg number of tasks completed is systematically increased or decreased the clients behavior also systematically increases or decreases in direct correspondence with those criterion changes This concurrent and systematic relationship between the criterion and the behavior provides strong evidence that the intervention the criterion change is responsible for the observed changes in behavior thereby demonstrating experimental control If the behavior deviates significantly from the criterion eg consistently drastically above or below or shows no systematic pattern experimental control would not be established

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