Comparing multiple communication modalities yields mixed results indicating that a broad focus may lead to narrow recommendations

Gevarter, C., O’Reilly, M. F., Rojeski, L., Sammarco, N., Lang, R., Lancioni, G. E., & Sigafoos, J. (2013). Comparing communication systems for individuals with developmental disabilities: A review of single-case research studies. Research in Developmental Disabilities, 34, 4415–4432.Source of funding and declaration of interests: Funding sources were not reported and the authors did not report other conflicts of interest.