The Rorschach inkblot test was developed in 1921 by Hermann Rorschach as a projective psychological test using inkblots. Over time, several scoring systems were developed including those by Beck, Klopfer, Rapaport, and Exner, with Exner's being the most extensive. Administration of the test involves introducing the subject to the technique, giving instructions, having them respond to each card and being questioned about their responses. Responses are then scored based on location, determinants, content, popularity, and form. Calculations are performed on the scores to obtain ratios and derive further scores which are then interpreted both qualitatively and quantitatively.