Research work under the project "Mathematical Techniques in Psychology" focused on the development of mathematical techniques for studying psychological problems. These methods have mainly related to three fields of psychology: psychological scaling, learning and concept formation, and mental measurement. Eighty experimental and theoretical research studies were conducted, 43 of which were published; 54 investigators were involved. Included are 1) a list of technical reports and articles published (1953-73) each specifying area of inquiry (psychological scaling, learning, test theory, statistical theory, or miscellaneous) and if it is a factor analysis and/or a dissertation, and 2) a list of relevant computer programs as of May 1970.