One of the tasks of differential psychology is related to the identification and measurement of individual differences and their use in predicting outcomes in any area of applied psychology (Hogan & Holland, 2003).
Emotional intelligence (EI) is a relatively new construct in differential psychology. Proponents of EI have made strong claims for its importance in basic and applied psychology (Matthews et al., 2012).
This is the first volume of the publisher's series "Handbooks in Personality and Individual Differences." Leading off the collection of 30 contributed chapters are two extended articles on the history, scope, and methodology of differential psychology. It's a discipline that has ramifications in numerous fields, including health care, business, social behavior, and education and counseling--and the audience for this volume could and should be broad.