Measurement Theory in Action: Case Studies and Exercises comprises twenty modules, each corresponding to entire chapters in typical measurement theory texts. The modules begin with introductory concepts and a review of statistics; progress through conceptions of content, criterion-related, and construct validation, validity generalization and test-bias; and conclude with more advanced topics such as multiple regression and item response theory (IRT). Each module is composed of an overview, case studies, exercises, Internet references, and suggested further readings. An extensive glossary of key terms is also provided for quick reference. An Instructor's Resources CD containing exercises and assignments is also available.
A popular definition of validity is whether a test measures what it is intended to measure. More accurately, the process of validation does not seek to determine whether the test itself is valid, but rather whether the inferences and conclusions that are made on the basis of test scores are valid (Murphy & Davidshofer, 2001). The traditional concept of validity considered several seemingly independent strategies for establishing the validity of a test, including content validation, criterion-related validation, and construct validation. Today, we recognize that all evidence examined in relation to the inferences and conclusions of test scores contributes to the same process: validation. Although we recognize validity as a unified construct, Modules 6, 7, and 8 each provide a discussion ...