Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

This work, honoring Saul B. Sells, adds to the understanding of the science of psychology and the application of that knowledge to meaningful human endeavors. Covers topics including: the interactionist approach and the importance of multivariate design, accuracy of measurement in order to move toward the understanding of human behavior, and the necessity of understanding personality characteristics and environmental affect.
Important reading for researchers, students, and professionals in all subdisciplines of psychology, including personality development, social psychology, research methods, evaluation and measurement.

This work, honoring Saul B. Sells, adds to the understanding of the science of psychology and the application of that knowledge to meaningful human endeavors. Covers topics including: the interactionist approach and the importance of multivariate design, accuracy of measurement in order to move toward the understanding of human behavior, and the necessity of understanding personality characteristics and environmental affect. Important reading for researchers, students, and professionals in all subdisciplines of psychology, including personality development, social psychology, research methods, evaluation and measurement.