Practical Psychometrics

Benjamin J. Lovett, PhD, is Associate Professor of Psychology and Education at Teachers College, Columbia University, where he teaches courses in psychoeducational assessment, legal and ethical issues for school psychologists, and the history of psychology. Dr. Lovett has over 100 publications, focusing on the assessment of high-incidence disabilities, the provision of testing accommodations, and the nature and management of test anxiety. He also serves as a consultant to schools and testing agencies on disability and assessment issues.

"This well-written text offers a concise, clinically relevant guide to using psychometrically based tests in psychology, social work, counseling, and related areas. The author’s voice is clear and approachable, almost like he is speaking with you. Discussion of bias and fairness is particularly well done, and will help students to deconstruct the many issues that are involved when using psychometric instruments. I was particularly impressed with the discussion of norming and multicultural issues, as this topic can be dissentious. The exercises at the end of each chapter are effective and thoughtful; the way they span multiple professional areas helps to make the volume applicable to students across various training programs."--J. Gayle Beck, PhD, Emerita Chair of Excellence, Department of Psychology, University of Memphis"It has been a struggle to find a resource that strikes the right balance of theory and applied practice to empower future practitioners with regard to test use, selection, and interpretation. Many of us have been clamoring for a resource like this for use in our master's-level programs! The presentation is incredibly accessible, and is anchored in a strong balance of practical, timely examples throughout."--Laura M. Spenceley, PhD, Dean, School of Education, State University of New York at Oswego"The case examples are really helpful and the writing style very accessible."--Matthew K. Burns, PhD, Rose and Irving Fein Endowed Professor of Special Education, University of Florida; Assistant Director, University of Florida Literacy Institute"Across eight chapters, Practical Psychometricsoffers a concise introduction to key terms, concepts, and research methods associated with mental measurement. The book achieves its goals of being readable, intuitive, clinically relevant, and technically accurate. Lovett’s writing is crystal clear, and his examples are vivid. This book covers a lot of ground and is well designed for graduate programs in school psychology, behavior analysis, social work, and counseling."--Randy G. Floyd, PhD, Professor and Chair, Department of Psychology, University of Memphis-

• Preface1. Introduction to Testing- Four Testing Stories- A Preview of the Book- Basic Terms in Testing- Tests as Assessment Tools2. Statistical Concepts- Univariate Descriptive Statistics- Bivariate Descriptive Statistics: Correlation and Regression- Group Differences- Conclusions- Applied Exercises3. The Meaning of Test Scores- Norm-Referenced Scores- What’s Normal? What’s Not?- Issues in Norm-Referenced Score Interpretation- Conclusions- Applied Exercises4. Reliability- Defining Reliability- Evaluating a Test’s Reliability: Background- Practical Ways of Estimating Reliability- Interpreting and Applying Reliability Estimates- Reliability of Differences and Profiles- Item Response Theory- Conclusions- Applied Exercises5. Validity- Tests, Constructs, and Inferences- Types of Validity Evidence- Validity and Classification- Evaluating Validity Evidence- Conclusions- Applied Exercises6. Factor Analysis- EFA: A Few Motivating Examples- Reviewing EFA Data- Factor Analysis and Diagnostic Testing- Factor Analysis and Validity- Confirmatory Factor Analysis- Conclusions- Applied Exercises7. Bias and Fairness- The Problem of Group Differences- Test Bias and Psychometric Validity- Contrasting Bias with Other Problems- Fairness in Test Use- Conclusions- Applied Exercises8. Sharing Test Results- The Oral Feedback Session- The Written Report- ConclusionsAppendix A. Resources for Further StudyAppendix B. Answers for Applied ExercisesGlossaryReferencesIndexAbout the Author