Definition: An ABA design is a type of experimental design in which participants are first introduced to a baseline condition (A). In the baseline condition, no treatment or experimental variable is introduced. Next, participants receive the experimental condition or treatment (B), after which they return to the baseline condition (A). The ABA design allows experimenters to observe behavior before treatment, during treatment and after treatment.
What Is an ABA Design?
By Kendra Van Wagner, About.com Guide
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