Graduation Year


Document Type




Degree Name

Master of Science (M.S.)

Degree Granting Department

Child and Family Studies

Major Professor

Catia Cividini-Motta, Ph.D.

Committee Member

Kimberly Crosland, Ph.D.

Committee Member

Nicole McMillan, Ph.D.


tact training, discrete trial training, stimulus modality


Individuals with disabilities often have a limited tact repertoire. This study compared the acquisition and generalization of tacts taught using different stimulus modes within discrete trial training (DTT) with children who have a limited tacting repertoire. The three stimulus modes that were compared were videos, pictures, and 3D objects. This research replicated Gómez’s (2015) methodology with a participant pool with lower tacting skills. In addition, this study assessed for generalization of the acquired tacts to a novel exemplar. In this study, tact training required fewer sessions when the picture and 3D object were used as stimulus modes. These results were then replicated across stimulus sets with Abraham and Alex. Finally, in this study greater generalization was observed for the tacts trained with a 3D object.