Experimental methods provide valuable and reliable data on behavior functions, but involve significant time and expense for patients and experimenters. In contrast, descriptive methods are based on parent/caregiver-report, direct behavioral observations, and provide information on both consequent and antecedent predictors of behavior. Descriptive methods are strongly correlated with experimental analyses and have advantages because of the information provided on antecedent functions and in their relative cost-effectiveness (Horner, et al., 1997). This study will pilot the use of descriptive assessment methods as an outcome measure and use experimental FBAs to corroborate the results of the descriptive analyses.