Research has demonstrated that higher levels of parent language use is correlated with later language use and intellectual development of their children. Children with autism spectrum disorder (ASD) display deficits in social and communication skills. They also demonstrate repetitive and restrictive behaviors or interests. These behavioral deficits and excesses may contribute negatively to language development, as well as parent and child social interactions, and communication exchanges. The current study used a nonconcurrent multiple-baseline design to evaluate the effectiveness of behavior skills training (BST) and on-going graphical and verbal feedback on increasing parent language use and child words and utterances. Results of this study demonstrated that BST with on-going feedback was effective in increasing parent language use and child words and utterances above baseline levels for all four parent-child dyads. The dissertation concludes with recommendations for future research. / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2017. / FAU Electronic Theses and Dissertations Collection