SPSS for Windows is a powerful, easy-to-use statistical analysis program that is included free of charge with the Graziano and Raulin text. The version included with this edition of the text is 8.0. It is a full-functioning SPSS for Windows that will operate for 13 months from the time it is first installed on a computer. In addition to the resources provided by the SPSS corporation, we have included a brief tutorial, examples of dozens of statistical analyses, and practice problems.