'Colin Cooper's updated textbook is a joy to read. It cuts through the thicket of detail to explain important concepts in an easy-going style that students will appreciate...I shall be using this book in my undergraduate individual differences lectures and encourage other lecturers to do likewise.'
Professor Philip J. Corr, University of East Anglia
'This is the best available comprehensive introduction to differential psychology. It covers the topics, techniques and many of the tests in an accessible, authoritative and agreeable way."
Professor Ian J. Deary, University of Edinburgh