Bruce B. Frey, PhD, is an award-winning researcher, author, teacher, and professor of educational psychology at the University of Kansas. He is the editor of The SAGE Encyclopedia of Educational Research, Measurement and Evaluation and the SAGE Encyclopedia of Educational Design . In addition to being the lead author for The Statistics for People Who (Think They) Hate Statistics series, his books for Sage include T here's a Stat for That!, and 100 Questions (and Answers) About Tests and Measurement . He also wrote Statistics Hacks for O'Reilly Media. In his spare time, Bruce leads a secret life as Professor Bubblegum, host of a YouTube channel and Echo Valley , a podcast that celebrates bubblegum pop music of the late 1960s. The show is wildly popular with the young people.