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.

Psychological Scaling
Psychological scaling

“Measurement essentially is concerned with the methods used to provide quantitative descriptions of the extent to which individuals manifest or possess specified characteristics” (Ghiselli, Campbell, & Zedeck, 1981, p. 2). “Measurement is the assigning of numbers to individuals in a systematic way as a means of representing properties of the individuals” (Allen & Yen, 1979, p. 2). “‘Measurement’ consists of rules for assigning symbols to objects so as to (1) represent quantities of attributes numerically (scaling) or (2) define whether the objects fall in the same or different categories with respect to a given attribute (classification)” (Nunnally & Bernstein, 1994, p. 3).

No matter which popular definition of the term measurement you choose, several underlying themes emerge. First, we need to be able ...

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