Date of Award


Document Type


Degree Name

Master of Arts (MA)



First Advisor

J. Michael Leibowitz

Second Advisor

Karen Budd

Third Advisor

Shelton Hendricks


This experiment analyzed the relative effectiveness of three forms of omission training (OT 20 sec, OT 5 sec, and gradual OT with a time-dependent criterlor) in reducing a bar press response following three different reinforcement histories. Thirty-six children between the ages of 4% and 11 years were initially trained to press a bar according to a VR 35 schedule of reinforcement. The different omission training conditions were introduced directly following the VR 35 baseline, following a lengthened history of VR, and following a DRL intervention condition designed to enhance the effectiveness of the OT condition.


A Thesis Presented to the Department of Psychology and the Faculty of the Graduate College University of Nebraska In Partial Fulfillment of the Requirements for the Degree Master of Arts University of Nebraska at Omaha.

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Psychology Commons