Principles Of Educational And Psychological Measurement And Evaluation

This edition continues Sax's tradition of comprehensive and comprehensible coverage of testing and measurement principles while including the most recent theory and research.

* Surveys topics in measurement and evaluation for education students in Education or Psychology departments.* Helps students understand the relevance of the subject by examining implications, assumptions and effects of testing and assessment.* Presumes no mathematic sophistication--conceptual formulas are presented with explanations and examples.* Covers teacher-made and standardized tests; and the relationship of measurement principles to objectives.

Validity is the hallmark of quality for educational and psychological measurement. But what does quality mean in this context? And to what, exactly, does the concept of validity apply? These apparently innocuous questions parachute the unwary inquirer into a minefield of tricky ideas. This book guides you through this minefield, investigating how the concept of validity has evolved from the nineteenth century to the present day. Communicating complicated concepts straightforwardly, the authors answer questions like: What does ′validity′ mean? What does it mean to ′validate′? How many different kinds of validity are there? When does validation begin and end? Is reliability a part of validity, or distinct from it? This book will be of interest to anyone with a professional or academic interest in evaluating the quality of educational or psychological assessments, measurements and diagnoses.