Introduces the articles of this theme issue focusing on the involvement of key stakeholder groups in the validation of large-scale high-stakes assessments. Each makes a unique but complementary contribution to the understanding of the demands of a comprehensive validation effort. (SLD)

The authors describe the significant contributions of Robert Ebel to educational measurement theory and its applications. A biographical sketch details Ebel's roots and professional resume. His influence on classroom assessment views and procedures are explored. Classic publications associated with validity, reliability, and score interpretation…