State conditions and environmental variables were measured over a 5-hour period for 25 students (ages 3-21) with profound and multiple handicaps. Results showed the presence of state sequence patterns, short state change periods, and a relatively small amount of association between specific behavior states and environmental factors and events.…

Four boys (ages 5 to 12) with developmental disabilities and severe challenging behaviors were evaluated using two functional assessment procedures: different analog probe conditions, and direct classroom observation of the child's behavior, antecedents, and consequences. Results raised questions about the reliability and ecological validity of…