Abstract
Three functional assessment methods were conducted with four adults with severe to profound mental retardation who exhibited stereotypic behavior. We compared the results of an informant assessment using the MAS, an A-B-C direct observation assessment, and a functional analysis in which variables were manipulated in four experimental conditions. The results of the A-B-C observations and the MAS indicated a sensory function of the stereotypic behavior for all subjects. The functional analysis results were more ambiguous, with a different pattern of results for each subject. These results are discussed with regard to the practicality and utility of each functional assessment procedure conducted in an applied setting.
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