The autonomic system is behaviorally observable in the patterns of respiration, color changes, tremulousness, and visceral signals, such as bowel movements, gagging, and hiccoughing. The motor system expresses itself in posture, tone, and movement patterns; state organization in the range of states from sleeping to awakening, and full arousal with crying, the degree of robustness and definition of each state, and the patterns of state to state transitions. The attention and interaction system, within the state continuum, is expressed in the ease of coming to an alert, attentive state, the robustness and definition of the alert state, and the utilization of the state in taking in cognitive and social emotional information from the environment, and in turn eliciting and modifying such inputs from the surrounding world. The regulatory system behaviorally expresses itself in the strategies utilized to maintain and/or regain a balanced, relatively stable and relaxed state of subsystem integration. If the infant fails to return to well-integrated subsystem balance, the infant is further assessed on the kind and amount of environmental facilitation required to aid the infant in returning to balance.