Date of Award


Degree Name

Master of Science


Behavior Analysis and Therapy

First Advisor

Ringdahl, Joel


This study replicated the response-restriction free-operant procedures of Hanley et al. (2003) and expanded their study by comparing the results to that of a paired choice and multiple stimulus without replacement preference assessments. I also compared the results to a modified version of the Hanley et al. procedures. A statistical analysis was conducted with the hierarchies identified from each assessment using the Spearman Rank order to measure the correlation within and across participants. Finally, I analyzed the results of 32 free operant preference assessments to identify at what point preference was identifiable.




This thesis is only available for download to the SIUC community. Others should
contact the interlibrary loan department of your local library.