The assessment of individual differences has generated shockwaves affecting sociology, education, and a number of other behavioral sciences as well as the fields of management and organizational behavior. In covering the assessment of individual differences, this book pays tribute to the interests and activities that Douglas N. Jackson has incorporated into his career as a psychologist. He continues to be a leader in putting academic findings to practical use. He has also inspired generations of students with his mastery of complex concepts and as a personal example of the ability to balance several simultaneous areas of research. Consistent with the focus of Jacksons research, the theme of this book will be how the use of deductive, construct-driven strategies in the assessment of individual differences leads to benefits in terms of the applicability of the assessment instruments and the clarity of the conclusions that can be drawn from the research.