Sincemany of the behaviors occurred at very low or high frequency rates, PABAK was used in place of Cohen’s Kappa due to Cohen’s Kappa’s sensitivity to high or low prevalence, for which PABAK adjusts (Mackinnon, 2000). With the exception of the behavior “lip lick” which achieved the lowest PABAK score of 0.52, all other behaviors achieved a minimum of 0.60 or higher degree of agreement.