• Are the dependent variables clearly defined? Consider the operational definition, the appropriateness of the measurement system, and reliability (e.g., data collectors, IOA).

article: article: Classroom Management in Self-Contained Classrooms for Children with Autism: Extending Research on the Color Wheel System. https://doi.org/10.1007/s40617-018-0264-6

textbook: Ledford, J. R., & Gast, D. L. (Eds.) (2018). Single case research methodology: Applications in special education and behavioral sciences (3rd ed.). New York, NY: Routledge