Children with limited oral language due to developmental and language delays have difficulty with communication in their everyday lives. Their trouble with speech and/or language impacts their ability to socialize with peers and learn in the school setting. Most of the research on alternative and augmentative communication systems and oral…

In three experiments I sought to experimentally test a source of emergent relations defined as transitivity by Stimulus Equivalence theory or as combinatorial entailment in Relational Frame Theory. In Experiment I, the participants were 4 children diagnosed with autism who also demonstrated significant cognitive and language delays, who were…