Single subject research design refers to a unique type of research methodology that facilitates intervention evaluation through an individual case.
Single subject research design is a type of research methodology characterized by repeated assessment of a particular phenomenon (often a behavior) over time and is generally used to evaluate interventions [2]. Repeated measurement across time differentiates single subject research design from case studies and group designs, as it facilitates the examination of client change in response to an intervention. Although the use of single subject research design has generally been limited to research, it is also appropriate and useful in applied practice.
Single subject research designs differ in structure and purpose and typically fall into one of three categories: within-series designs, between-series designs and.
