Addressing Treatment Nonresponders

The goal of this clinical trial is to see if providing late talking toddlers who are not responding to the Vocabulary Acquisition and Usage for Late Talkers (VAULT) treatment with a different way of communicating will help them improve their word learning. Participants will start with VAULT word learning treatment. If, in the first few sessions, it looks like they won't respond well, they will be provided with a Big Mack Augmentative and Alternative Communication device (a button that says a word when you press it) to use for their responses. The investigators will see if this modification will help with word learning.

Children will begin Vocabulary Acquisition and Usage for Late Talkers (VAULT) word learning treatment. If, after three sessions, they do not show an initial response to treatment, they will be provided with a Big Mack Augmentative and Alternative Communication device which will allow them to 'say' the treatment words with the device. Treatment will continue until the children have had 8 total weeks of treatment (2x/wk for 30 minutes per session). The investigators will measure word learning across time tracking both spoken productions and productions made with the device.