“…The first step in assessing client SIB is to thoroughly determine the frequency, duration, and onset of the SIB and the antecedents and consequences of the SIB. Although measures have been developed to assess for the severity (see Iwata, Pace, Kissel, Nau, & Farber, 1990) and the frequency and sever-ity (see Brasic et al, 1997) of repetitive stereotypical and compulsive SIB concurrent with mental retardation, autism, neuroacanthocytosis, and Tourette's syndrome, no formal assessments have been developed to assess for impulsive or major SIB. Because no formal assessment measures have been developed to assess for SIB, a thorough informal assessment during the diagnostic interview is necessary.…”