Samuel O. Ortiz, PhD, is Associate Professor of Psychology and former Director of the School Psychology Program at St. John's University, Queens, New York. He earned his Ph.D. in Clinical Psychology from the University of Southern California and completed postdoctoral training in Bilingual School Psychology at San Diego State University where he also obtained certification as a school psychologist. In addition, he has served as Visiting Professor and Research Fellow at Nagoya University in Japan and was recently elected Vice President for Professional Affairs of Division 16 of APA beginning Jan. 2003. Dr. Ortiz trains and consults nationally and internationally on topics ranging from nondiscriminatory assessment to contemporary evaluation of learning disabilities. He combines practical and research based experience with specialized education and training in working with culturally and linguistically diverse children and parents. Dr. Ortiz is bilingual (Spanish) and bicultural (Puerto Rican). Dawn P. Flanagan, PhD, is Professor of Psychology at St. John's University and Clinical Assistant Professor of Psychology at Yale Child Study Center, Yale University School of Medicine. She serves as an expert witness, learning disabilities consultant, and psychoeducational test/measurement consultant and trainer for national and international organizations. Dr. Flanagan is an author of numerous publications and best known for her development of the Cross-Battery Assessment approach and the development of an operational definition of specific learning disability. Vincent C. Alfonso, PhD, is the Dean of School of Education at Gonzaga University. He is the past president of Division 16 (School Psychology) of the American Psychological Association, fellow of Divisions 16 and 5 of the APA, and a certified school psychologist and licensed psychologist. He has been providing psychoeducational services to individuals across the lifespan for more than 20 years. He is the co-editor with Dawn Flanagan of Essentials of Specific Learning Disability Identification, and co-author of Essentials of Cross-Battery Assessment, Third Edition.