Psychological Testing
Theory and Practice

Winner of the British Psychological Society's Textbook Award 2019.

Psychological tests are everywhere. They are widely used by practitioners, researchers, clinicians, and educators -anyone, in fact, who needs to measure various aspects of personality, cognitive abilities, mood and suchlike. Psychometrics is the science of psychological assessment. It covers the construction, use and interpretation of psychological tests of all kinds ? from simple questionnaires measuring personality, moods and attitudes, through to specialised tests measuring IQ and other mental abilities.

Psychological Testing: Theory and Practice provides test users, test developers, practitioners and researchers in the social sciences, education and health with an evaluative guide to choosing, using, interpreting and developing tests. Its aim is to give readers a thorough grasp of the principles (and limitations) of testing, together with the necessary methodological detail. Unusually for an introductory text, it includes coverage of several cutting-edge techniques. If you find mathematics frightening and statistics dull, this engaging text will help you to understand the fundamental principles of psychometrics, that underpin the measurement of any human characteristic using any psychological test.

The book is accompanied by additional resources, including a set of spreadsheets which use simulated data and other techniques to illustrate important issues, and allow users to understand various statistical procedures work, without getting bogged down in mathematical detail. These are fully integrated into the text.

This is an essential introduction for all students of psychology and related disiplines, as well as a useful resource for practitioners and those seeking accreditation in psychological testing.

1. Introduction to Psychometrics
2. Tests, Scales and Testing
3. Scoring Tests and Scales
4. Interpreting Scores
5. Correlations
6. Random and Systematic Errors of Measurement.
7. Validity
8. Introduction to Factor Analysis
9. Performing and Interpreting Factor Analyses
10. Alternative Factor Analysis Designs
11. Developments in Factor Analysis
12. Item Response Theory
13. Constructing a Scale
14. Problems with Test Scores
15. Psychometrics in Context
16. References
17. Index

Dr Colin Cooper has researched and taught psychometrics and individual differences at Queen’s University, Belfast for 20 years. He has published widely in these fields, and has been extensively involved in test design and consultancy.