Guilford, J. P.2011-04-012011-04-011985Guilford, J. P. (1985). A sixty-year perspective on psychological measurement. Applied Psychological Measurement, 9, 341-349. doi:10.1177/014662168500900401doi:10.1177/014662168500900401http://purl.umn.edu/102189Based upon experiences with most kinds of methods of psychological measurement, this article presents comments on a variety of uses, including psychophysics, scaling, testing, and factor analysis. Some difficulties are pointed out, some faults are mentioned, and a variety of applications are discussed, some of them unusual.enArticle