Neil J. Salkind received his PhD in human development from the University of Maryland, and after teaching for 35 years at the University of Kansas, he was Professor Emeritus in the Department of Psychology and Research in Education, where he collaborated with colleagues and work with students. His early interests were in the area of children's cognitive development, and after research in the areas of cognitive style and (what was then known as) hyperactivity, he was a postdoctoral fellow at the University of North Carolina's Bush Center for Child and Family Policy. His work then changed direction to focus on child and family policy, specifically the impact of alternative forms of public support on various child and family outcomes. He delivered more than 150 professional papers and presentations; written more than 100 trade and textbooks; and is the author of Statistics for People Who (Think They) Hate Statistics (SAGE), Theories of Human Development (SAGE), and Exploring Research (Prentice Hall). He has edited several encyclopedias, including the Encyclopedia of Human Development, the Encyclopedia of Measurement and Statistics, and the Encyclopedia of Research Design. He was editor of Child Development Abstracts and Bibliography for 13 years. He lived in Lawrence, Kansas, where he liked to read, swim with the River City Sharks, work as the proprietor and sole employee of big boy press, bake brownies (see [...] for the recipe), and poke around old Volvos and old houses.

Bruce B. Frey, PhD, is an award-winning teacher and scholar at the University of Kansas. He has authored more than 100 research articles and papers. Among his books are the best-selling textbook, Statistics for People Who (Think They) Hate Statistics, Modern Classroom Assessment, and There's a Stat for That!, all published by SAGE, and Stat Hacks published by O'Reilly. He is the editor of The SAGE Encyclopedia of Educational Research, Measurement, and Evaluation. In his free time, he celebrates bubblegum pop music of the late 1960s on his popular podcast, Echo Valley.