Date of Award


Degree Type


Degree Name

Master of Science


Liberal Studies

First Advisor

Ruth L. Meese, Ph.D.

Second Advisor

Patricia R. Whitefield, Ph.D.

Third Advisor

Rachel Mathews, Ed.D.


A constant time delay procedure was used to teach two students with moderate mental retardation how to purchase food at local fast food restaurants and snacks at a local convenience store. Students were taught to purchase the items using paper money and were required to determine the amount due by locating the next dollar up amount on a number line. A 5-second time delay was used in teaching the subjects these purchasing skills. Training was evaluated with a multiple probe design across settings. Results indicated subjects did not reach criterion in the fast food setting. In the convenience store setting subjects did not reach the criterion level; however, subjects made substantial improvements in their purchasing skills.



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