The construct validity of the Behavior Intervention Rating Scale (BIRS) was investigated to develop an instrument to measure teachers' perceptions of treatment acceptability and percieved effectiveness of classroom interventions. An obligue factor analysis was utilized, and three factors, Acceptability, Effectiveness, and Time of Effect, were determined. Correlational analysis demonstrated moderate to strong relations among the three factors. The BIRS was shown to be a valid measure of two general constructs important to treatment evaluation, acceptability and effectiveness.
ASJC Scopus subject areas
- Developmental and Educational Psychology