Lori-Ann B Forzano is Professor of Psychology at The College at Brockport, State University of New York, where she regularly teaches undergraduate and graduate courses in research methods, statistics, learning, animal behaviour, and the psychology of eating. Her research examines impulsivity and self-control in adults and children and has been published in the Journal of the Experimental Analysis of Behavior, Learning and Motivation and The Psychological Record. Dr. Forzano also co-authored Essentials of Statistics for the Behavioral Sciences. She received her PhD in experimental psychology from the State University of New York at Stony Brook. Larry B. Wallnau is Professor Emeritus of Psychology at The College at Brockport, State University of New York. While teaching at Brockport, he published numerous research articles in biopsychology and provided editorial consultation for journals in his field. He has taught statistics, animal behavior, biopsychology, psychopharmacology and introductory psychology. With Dr. Frederick J Gravetter, he co-authored all previous editions of STATISTICS FOR THE BEHAVIORAL SCIENCES, now in its 10th edition. Dr. Wallnau received his bachelor's degree from the University of New Haven and his Ph.D. in psychology from the State University of New York at Albany. In his leisure time, he is an avid runner with his canine companion, Gracie. The late Frederick J Gravetter was Professor Emeritus of Psychology at The College at Brockport, State University of New York. While teaching at Brockport, Dr. Gravetter specialized in statistics, experimental design, and cognitive psychology. He received his bachelor�s degree in mathematics from M.I.T. and his Ph.D. in psychology from Duke University. In addition to publishing several research articles, Dr. Gravetter co-authored Statistics for the Behavioral Sciences and Essentials of Statistics for the Behavioral Sciences.