HEATHER E. P. CATTELL, PhD, is an author of the 16PF^® Fifth Edition Questionnaire, published in 1994, which she worked on with her father, Raymond Cattell, the developer of the original 16PF^®. She has written many articles and chapters on the 16PF^® and coauthored the 16PF^® Cattell Comprehensive Personality Interpretation report.
JAMES M. SCHUERGER, PhD, is Professor Emeritus at Cleveland State University. He conducts workshops nationally on the 16PF^®, worked with Raymond Cattell at the University of Illinois for many years, and is the author of the Adolescent Personality Questionnaire––the junior version of the 16PF^®.