The Indicators of Successful Inclusion Scale (ISIS) was developed to measure pre-service and practicing educators' beliefs regarding factors that contribute to educating students with disabilities in general education classrooms. The measure was designed to assess teachers' beliefs and attitudes related to inclusive education and to consider their…

This paper summarizes an action research project to develop a math screening instrument that would be effective (valid and reliable) and efficient (time for administration). An instrument was developed after review of the mathematics assessment and mathematics disabilities literature. The instrument was administered to kindergarten, first, and…

The purpose of the present study was to document the development and standardization of the "Preschool Behavioral and Emotional Rating Scale" and to examine its factor structure, internal consistency, and criterion validity. Data from a nationally representative sample (N = 1,471) of preschool children with and without disabilities were…

This study examines the incorrect response choices, or distractors, by students with disabilities in standardized reading assessments. Differential distractor functioning (DDF) analysis differs from differential item functioning (DIF) analysis, which treats all answers alike and examines all wrong answers against the correct answer. DDF analysis…

Alternatives to the standard statewide assessment often are necessary for valid measurement of students with significant disabilities. These alternate assessments must be carefully developed and evaluated with respect to generally accepted psychometric standards. Ideally, these measures should be sensitive to growth and scaled to state tests that…

The responses of 81 Canadian junior and community college students with disabilities were used to develop and evaluate the Scale of Adaptive Information Technology Accessibility for Postsecondary Students with Disabilities (SAITAPSD). This is an 18-item self-administered tool that evaluates computing accessibility for and by students with various…

This study examined the psychometric characteristics of the Scholastic Aptitude Test (SAT) administered under special conditions for nine handicapped groups. Four psychometric characteristics were studied: level of test performance, test reliability, speededness, and extent of unexpected differential item performance. Psychometric comparisons were…