Introductory Statistics for the Behavioral Sciences has had a long and successful publication history; it has been in print continuously for over thirty years. This revision will be the first for former co-author, Barry Cohen, to direct. As the author of two other successful Wiley statistics texts, he has garnered a strong reputation for crafting language that is easy for students to understand and use with both their own projects and the studies they must critique. Professor Cohen's Explaining Psychology Statistics ( 3rd edition 2007 Wiley) serves the graduate course that follows the Masters and upper-undergraduate course this text serves.