Purpose: Single-case experimental designs are widely used to study interventions for communication disorders. Traditionally, single-case experiments follow a response-guided approach, where design decisions during the study are based on participants' observed patterns of behavior. However, this approach has been criticized for its high rate of…

Research on facilitated communication (FC) is discussed, along with flaws in previous validation studies and suggestions for improving validation studies, including: testing first whether the person can do the task required under quiet, relaxed conditions; allowing the person to practice the skill until it can be used during the validation test;…