"Single-case experimental designs," wrote Plavnick & Ferreri (2013) "developed by experimental and applied behavior analysts, offer an inductive process... Such designs have been essential in the development of effective instructional practices for students with disabilities and have much to offer the broader educational population as well."
Single-case experimental design (SCED), also known as single-subject researcher design (SSRD), and single-case method (SCM), is an experimental design in which the participant serves as his/her own control. The designs are sensitive to differences in the individual, rather than differences in averages of the group. Some Precision Teachers have used SCED to record and change, for example, spelling and expressive writing.
Support for the use of SCED includes Lane & Gast (2013), who articulated that "visual analysis of graphic displays of data is a cornerstone of studies using a single case experimental design." Their article highlights "the importance of collecting reliability data for dependent measures and fidelity of implementation of study procedures."
Also, Hurtado-Parrado & López-López (2015) presented "a historical and conceptual analysis of a group of research strategies known as the Single-Case Methods." They discussed the success of SCED in behavioral analysis, and posit that SCED "should be considered as an alternative to [Null Hypothesis Significance Testing] because many of the recommendations for improving the use of significance testing."
SCEDs have the ability advance knowledge and provide adaptable alternatives to groups designs. Smith (2012) conducted a systematic review of the literature and concluded SCED offers a powerful method for conducting experimental analyses with individuals.