Introduction to the JPA special supplement on International Reference Samples for the Rorschach Comprehensive System.

This Introduction provides an overview to the JPA Special Supplement on International Reference Samples for the Rorschach Comprehensive System (CS; Exner, 2001). It contains a history of this project and a table including all of the lead authors, their country and the type and size of their sample. Suggestions for conducting this type of research are offered, including information on normative vs. nonpatient samples, inclusion/exclusion criteria, the use of collateral instruments, and concerns relative to representativeness. Reliability and coding concerns are addressed, and information on the Popular response in Japan are reviewed. Finally, trends within and across the data are highlighted.