This series provides applied researchers and students with analysis and research design books that emphasize the use of methods to answer research questions. Rather than emphasizing statistical theory, each volume in the series illustrates when a technique should (and should not) be used and how the output from available software pr ograms should (and should not) be interpreted. Common pitfalls as well as areas of further development are clearly articulated. ograms should (and should not) be interpreted. Common pitfalls as well as areas of further development are clearly articulated.