Thirty-nine students in classes for deaf-blind children were assessed using the Behavior Rating Instrument for Autistic and Other Atypical Children (BRIAAC). Each child was observed for two hours and was rated on the eight BRIAAC scales. The Behavior Rating Instrument evaluated the child's motivation as it emerged in daily context. (JN)

A sequential-developmental approach to the assessment of individuals from the earliest sensorimotor period through the level of abstract reasoning is discussed. The assessment is hierarchically sequenced and is concerned with how and why individuals process information. The assessment procedures provide practical data on levels of development. (JN)