Objective: The research aimed to determine the effectiveness of vestibular stimulation in promoting communicative intents in preschool children with autism. Method: Three participants participated in this single-subject A-B-A design for this investigation. The independent variable for this investigation was vestibular stimulation, and the dependent variable was the frequency of communicative intentions. The baseline phase included three sessions without intervention. During the sessions, the participants chose various communicative activities and were only given the prompt, “what would you like to play with?”. The intervention phase included nine sessions of vestibular stimulation at the beginning of each session. The intervention was implemented for five minutes, and the vestibular activity was prescribed by a licensed occupational therapist (OT). The withdrawal phase included three sessions without vestibular stimulation, and the participants chose various communicative activities. Results: Data analysis revealed that upon receiving the intervention, two participants showed an immediacy in a change of behavior when the intervention was introduced. Conclusions: Implementing vestibular stimulation resulted in increased communicative intent for two participants. Limitations of this study included small sample size, each participant choosing the same play materials offered in each phase, and each participant receiving a different type of vestibular input. Follow-up research is necessary to determine if one vestibular activity is more beneficial than another.
