Single-subject_design
Single-subject design
Research design
In design of experiments, single-subject curriculum or single-case research design is a research design most often used in applied fields of psychology, education, and human behaviour in which the subject serves as his/her own control, rather than using another individual/group. Researchers use single-subject design because these designs are sensitive to individual organism differences vs group designs which are sensitive to averages of groups. The logic behind single subject designs is 1) Prediction, 2) Verification, and 3) Replication. The baseline data predicts behaviour by affirming the consequent. Verification refers to demonstrating that the baseline responding would have continued had no intervention been implemented. Replication occurs when a previously observed behaviour changed is reproduced.[1] There can be large numbers of subjects in a research study using single-subject design, however—because the subject serves as their own control, this is still a single-subject design.[2] These designs are used primarily to evaluate the effect of a variety of interventions in applied research.[3]