part 1 TOKEN ECONOMY AND TARGET BEHAVIOR Resources Attributes and Evaluation of Discussion Contributions. Professional Communications and Writing Guide. In this Instructor Contact Session, you will hear your instructor talk more about reversal and/or withdrawal designs. Search through the ABA literature and locate a study that uses a reversal or withdrawal design during some aspect of the experiment. Summarize the study and evaluate the internal validity of the study. part 2 MULTIPLE TREATMENT REVERSAL DESIGNS Resources Attributes and Evaluation of Discussion Contributions. Professional Communications and Writing Guide. In this Instructor Contact Session, you will hear your instructor talk about multiple treatment reversal designs. Listen to the lecture and take notes. Then post a substantive response to the following discussion question: In Unit 2, you discussed multiple treatment reversal designs and identified advantages and limitations that exist when one adds conditions over the course of a study. In Units 4 and 5, you were provided additional information about these use of variations of the A-B-A-B design. Has your original position or perspective on these designs changed? Which of the A-B-A extension designs would you select for a behavioral research study you might conduct? Response Guidelines