I need to thank the professionals at SPSS. In particular, Matthew Madden made information available that was invaluable in the writing of this book. Aaron Rangel operated an excellent program that provided access to a pre-release copy of the software. Sarah Tomashek connected me with the information necessary to write and made certain I was able to receive a copy of the software. Beth Narrish was kind enough to provide me with early access to a copy of the final release of SPSS.

Amy Fandrei at John Wiley first came up with the idea that this book should be written.

Christopher Morris at John Wiley was patient and understanding when delivery deadlines whisked by. He kept everything sane while I juggled the chapters of the book with the delivery schedule. Rhonda Smith checked the book for mistakes, so if you find anything wrong, it's her fault. (Kidding. Just kidding.)