The 1990's have witnessed a continuation and expansion of the upsurge of interest in psychological testing that was evident in the 1980's. This growth is indicated by the development of new tests some representing novel approaches as well as by the revisions of earlier tests and continued research on existing tests. In selecting instruments for mention or discussion, a primary goal was to expose readers to the rich variety of measurement tools available in the field today, as well as to some historically significant tests and techniques: and attempt to cover the field or even a significant segment of it in a comprehensive fashion would have been clearly beyond the scope of this book.