The new edition of this bestselling guide to SPSS carefully leads the user through the process of using SPSS to analyze psychological data. As with previous editions, the third edition retains the breadth of coverage, clear writing and flexibility that has made it such a popular companion for students at all levels. It covers SPSS versions 12 and 13, while being backward compatible, and draws attention to the main ways in which these differ from earlier versions. It is updated with new coverage of reliability measures, partial correlations, and using statistics for scale constructions. In response to user feedback, it also features an expanded index.