This investigation analyzed information pertaining to behavior states and their relationship to numerous environmental, physiological, and demographic variables and events. The 66 participants ranged in age from 1 to 21 years and were classified as having profound and multiple disabilities, with developmental ages that ranged to 24 months. Behavior state and environmental codes were used to collect continuous data over an extended time period for subjects in 21 different educational settings. Participants were placed into eight groups by profiles that represented similar patterns of state conditions (inactive sleep, active sleep, drowse, daze, awake inactive-alert, awake active-alert, awake active-alert with stereotypy, and crying/agitation). The results were consistent with other investigations in the following areas: percentage of time students were observed in the eight states; relatively small time intervals between state shifts; similar probabilities that one particular state will follow another over time; a weak association between environmental events and state changes; a close similarity in the types of environmental variables and events present during observation sessions and settings; and a high correspondence in percentage occurrences for several demographic variables, levels of skill development, and extent of motor impairments and sensory losses. Results provided strong replication of previous findings and new information that further focused on the complex nature of state phenomena and associated variables. (Contains 30 references.) (JDD)