Use of the abikoff classroom observation coding system on a children's inpatient psychiatric unit

The Abikoff systematic observation coding system (Abikoff, Gittelman-Klein, & Klein, 1977) has received considerable attention in the literature for assessing disruptive and off-task classroom behavior. However, its use has been restricted to regular classrooms with clinic outpatients. The present study investigated the reliability and validity of this code when used in a classroom setting with children hospitalized on an inpatient psychiatric unit. Results demonstrated excellent reliability and acceptable concurrent and discriminant validity of the code when used in an inpatient setting, although data were equivocal regarding the ability of the code to discriminate medication status within subjects.