This fifth edition of Essmtial, s of Ed, watinwl Measuremntt, like the previous editions, has been designed as a textbook for introductory measurement courses and as a reference for practitioners engaged in the development and use of educational measures. The evaluation needs of teachers have been weighed heavily in making decisions about content coverage and emphasis, but consideration also has been tion of a chapter on nontest evaluation methods and the deletion of the chapters on persoriality measures and recent developments. Chapter 14, Nontest and Informal Evaluation Methods, describes the development and use of observation