Nice, R. W. (1959). Diagnostic methods. In R. W. Nice & P. Edward (Collaborator), A handbook of abnormal psychology (pp. 38-52). New York, NY, US: Philosophical Library.
http://dx.doi.org/10.1037/14421-003
As a psychodiagnostic method psychology has its beginnings historically from two sources—the psychometric and the psychodynamic. There is, of course, no one complete approach to psychodiagnosis for the psychologist may, and does, use many varied methods to arrive at his diagnosis. The following three sections in this chapter are given over to a presentation of these methods just discussed. The field of psychometrics is a study in itself and for this reason the interested reader should consult one of the many books available in this area. The material here presented is to give an indication of the various methods and the content of a few of these tests, and does not consist of a complete study in testing or psychometric methods. (PsycINFO Database Record (c) 2018 APA, all rights reserved)