Functional analysis is a methodology that has been used to assess the functions of aberrant or disruptive behaviors. The current article discusses how functional analysis may be useful for determining the functions of all communicative behaviors, whether they are aberrant or not. Two case studies are presented to illustrate the implementation of the three components of functional analysis: interviews, direct observation, and analog probes. Information from each of these three assessment sources contributes to the development of intervention plans addressing the unique communication needs of individuals with severe disabilities.
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Brady et al. (1997) studied this question.
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