Stuart Mullen

Date of Award


Degree Name

Master of Science


Behavior Analysis and Therapy

First Advisor

Dixon, Mark

Second Advisor

Hirst, Jason M.


The purpose of the current study was to assess the efficacy of the Promoting the Emergence of Advanced Knowledge Relational Training System Equivalence Module (Peak-E) in equivalence of tactile discrimination to arbitrary stimuli. Two participants were trained in two Peak: Equivalence programs of symmetry. The first program taught symmetry for a relation between arbitrary spoken words to a tactile object (stimulus A to stimulus B). The second program taught symmetry for a relation between tactile objects and arbitrary symbols (stimulus B to stimulus C) Then, after mastery was achieved for these two symmetry programs, emergent transitive and equivalence relations were subsequently tested for the relations between arbitrary spoken words (stimulus A) and arbitrary symbols (stimulus C). The results suggest that the Peak: E programs are effective in training symmetrical relations that lead to the emergence of derived relations.




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