Exploring the Validity of the Oregon Extended Writing Assessment

Abstract

Research into the technical adequacy of statewide alternate assessments is limited. In this study, the authors analyzed 2 years of data from one state's alternate assessment in written language in an attempt to validate current test score interpretations. More than 1,000 students were included in each year. Findings support the test's technical adequacy on two major dimensions: (a) strong convergent and discriminant evidence for tasks on the assessment and (b) evidence that a collection of writing subtasks contribute unique information to the assessment of writing among students in special education. Implications include the use of the data (a) on subtasks to inform instruction in written language and (b) for accountability purposes.