A single-subject design is a special type of within subject design using one participant or group to assess changes for that individual or group.
Six primary method types are discussed: the pre-experimental (or AB) design, the departure (or ABA/ABAB) design, the multiple-baseline/multiple-probe design, the changing-criterion design, the multiple-treatment design, and the alternating treatments and adjusted alternating treatments designs
In the design of experiments, a single-subject curriculum or single-case research design (SCED) is a research design most often used in involved fields of psychology, education, and human behavior in which the subject serves as his/her own control, rather than using another someone/group.
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