Communication Modality Preference and the Social Validity of Functional Communication and Mand Training.

Researchers have shown that behavioral interventions that incorporate communication as a focus have demonstrated efficacy for individuals with intellectual and developmental disabilities (IDD). Researchers have demonstrated that individuals with IDD allocate responding to one communicative response modality over others when multiple communicative modalities produce reinforcement in the context of a concurrent-schedules arrangement. Identifying preference for communicative response modality provides one approach to incorporating aspects of social validity in the design of behavioral interventions for individuals with IDD, placing additional importance on demonstrations of the robustness of this preference. In the current study, we evaluated preference among concurrently available communication modalities for 14 individuals with IDD. Results of the study replicated previous, similar research in that the vast majority of individuals demonstrated a preference between communicative response modalities. We discuss the results within the context of social validity and implications for intervention.