ABSTRACT
Single case research design is based on what M. Sidman and others have referred to as baseline logic. This chapter describes those single case designs commonly referred to as "withdrawal" or "reversal" designs. Historically these designs have been referred to as simple and repeated time series designs. There are circumstances in educational and clinical settings that may preclude the use of more extensive experimental designs that require the repeated withdrawal of the independent variable. For many practitioners responsible for programming durable behavior changes, even a brief withdrawal of an effective intervention may be deemed unethical. The withdrawal of the treatment package resulted in an immediate and abrupt change in frequency of self-choking in a contratherapeutic direction. The key distinction between reversal and withdrawal designs is that the reversal design withdraws or removes the intervention from one behavior and simultaneously applies it to an incompatible behavior.
