Dr. Warren is interested in early communication and language development and intervention in young children with developmental delays. His current work is primarily focused on the effects of prelinguistic communication intervention on later language development. He is also interested in how language develops in children with specific etiologies such as Down syndrome and Fagile-X syndrome. Dr. Yamamoto is interested in the relationship between language and culture, sociocultural contexts and language use, and language policy issues. His work includes ethnographic studies of Japanese and Native American languages.
Current fieldwork is conducted with several Native American communities in Arizona and Oklahoma.
One of the foci of the work involves documentation of endangered languages, creating effective language learning materials, and designing community based programs for language revitalization. Adjunct Faculty Melissa Bowerman.