Parents play a significant role in the educational development of their children. However, there is little research around utilizing parents to collect data on their children's language skills. In particular, children with autism oftentimes demonstrate delays in the acquisition and use of language. Having information on a child's language abilities may be of value when providing therapeutic supports. The present study evaluated the effects of treatment packages and specific treatment components on the frequency of Met tacts and parent supported vocal interactions across three parent-child dyads. A mixed multiple baseline design was utilized. Results showed that the full treatment package with all treatment components included, yielded higher frequencies of Met tacts when compared with baseline, a partial treatment package and a control condition. Data did not show increases across all parent-child dyads in parent supported vocal interactions. These results strongly suggested that when defined and specific treatment components are provided, parents are very effective at expanding the total number of Met tacts in their child's known repertoires. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]