In addition to co-authoring the first eight editions of INTRODUCTION TO RESEARCH IN EDUCATION, Donald Ary (B.S., M.S., Ph.D.) co-authored INTRODUCTION TO STATISTICS: PURPOSES AND PROCEDURES (with L. C. Jacobs), and ANALYZING QUANTITATIVE BEHAVIORAL OBSERVATION DATA (with H. K. Suen). He also co-authored the educational psychology text, READINGS IN CLASSROOM LEARNING AND PERCEPTION (with R. J. Mueller and E. C. McCormick). He wrote chapters for three books and published 35 journal articles, six of them in Behavioral Assessment. He presented papers at professional conferences, including the American Educational Research Association (AERA) and the Association for Behavioral Analysis. Dr. Ary taught research design, statistics, measurement, and educational psychology, first at Indiana University, then at Northern Illinois University, where he was director of the Educational Psychology and Special Education Research Office and interim chair of the Department of Educational Psychology, Counseling, and Special Education. He served as consultant to various educational offices in Illinois and to the Bureau of Elementary and Secondary Education, U.S. Office of Education. He also served on the editorial board of Research in Developmental Disabilities. Early in his career, Dr. Ary was an elementary teacher.
