Final answer:
An alternating treatment design (ATD) is an experimental design in which two or more conditions are presented in rapid succession, independent of the level of responding. The effects of each condition on the target behavior are noted and compared.
Step-by-step explanation:
An experimental design that presents two or more conditions in rapid succession, independent of the level of responding, and notes the differential effects on the target behavior is called an alternating treatment design (ATD).
In an ATD, each condition is presented in a separate phase, and the order of presentation is randomized. The researcher measures the effects of each condition on the target behavior and compares the results.
For example, in a study comparing two teaching methods, one group of students might receive Method A first, then Method B, while another group receives Method B first, then Method A. By alternating the order of the methods, the researcher can determine if one method is more effective than the other.