Design a simple single-subject study (using either a reversal or multiple-baseline design) that could be used to answer a research question in your specialization. Be sure to specify the treatment, operationally define the dependent variable, and discuss the validity of this type of design in comparison to an experimental design.

References to include: Bates, P.C. S. (2019). Methods in Behavioral Research (14th ed.). McGraw-Hill Higher Education (US).