Date of Award


Degree Name

Master of Science


Behavior Analysis and Therapy

First Advisor

Dixon, Mark


The purpose of the present study was to examine the relationship between the semi-standardized PEAK Pre-Assessments (PEAK-PA) and the standardized PEAK Comprehensive Assessment (PCA). Twenty-four participants were administered each tool, and an item by item analysis was conducted to evaluate correlations between tests. The results of the study suggest that there was a strong, positive correlation between the PEAK-PA and the PCA overall (r= 0.969, p< 0.0001, and for individual assessment sections (Direct Training: r= 0.947, p< 0.0001; Generalization: r= 0.968, p< 0.0001; Equivalence: r= 0.938, p< 0.0001; Transformation-Receptive: r= 0.889, p< 0.0001; Transformation Expressive: r= 0.953, p< 0.0001). Additionally, when looking at the items that were slightly different and completely different between each version of the assessments, individuals most often scored higher on the PEAK-PA than the PCA. Taken together, the results may suggest that although these two versions are highly correlated, the PCA may provide a lower estimate of skills overall.




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