Reliability and validity data are reported for the Motivation Assessment Scale, a 16-item questionnaire designed to identify variables maintaining self-injurious behavior in persons with autism and other developmental disorders. Results indicated that interrater reliability and test-retest reliability among teachers was good and that ratings…

Extensive evidence exists demonstrating the utility of Curriculum-Based Measurement in reading (R-CBM) for progress-monitoring purposes; however, most studies have evaluated R-CBM from a traditional psychometric perspective, which allows for variability in individual student's data that is not a function of increased skills (i.e., measurement…

This replication study found that only 16 of 55 raters agreed on the category of reinforcement maintaining a disabled individual's self-injurious behavior after using the Motivation Assessment Scale. Additionally, only 15 percent of the correlation coefficients obtained were above 80 percent, and none of the reliability scores was above 80…