The document, part two of a six part project report, discusses the construction and validation of a three stage model for assessing deviant behavior in children. The model was developed to meet the project's measurement, identification and diagnostic goals. Stage one consists of a 50 item behavior checklist which was used as an initial screening device. The scale is normed on elementary grade subjects; and item reliability and validity estimations are completed on the scale. Stage two consists of a 62 item behavior rating scale which is divided evenly between items to measure acting out behavior and items measuring withdrawn behavior. A behavioral observation form was developed for the purpose of measuring task oriented behavior. The form allows simultaneous observation of 13 behaviors, and contains codes for classroom setting, the social consequences of child behavior, and the social agent supplying the consequence. Identification data were collected in stage one and more specific data were collected in stages two and three for diagnostic and treatment prescription purposes. Further details on the project are contained in section one (EC 032 208) overview; section three (EC 032 210) treatment; section four (EC 032 211) generalization and maintenance; section five (EC 032 212) teacher behavior; and section six (EC 032 213) single subject experiments. (CD)