As reviewed in Chapter 1, the Crisi Wartegg System developed over the course of 30 years, through a process of continuous refinement based upon clinical experience and empirical research. This chapter summarizes major research studies concerning the CWS. It should be noted that while many of these research studies have been published previously, this marks the first time they are presented for English publication. Additionally, much of the previous research has been presented at conferences and symposia during the previous two decades, including annual conventions of the Society for Personality Assessment (SPA) and the International Rorschach Society (ISR). As such, the collected data presented here is based upon translations of Italian publications, journal articles, and academic texts; summaries of data presented at conferences and symposia; review of recently published English-language peer-reviewed journal articles; and presentation of recent reliability data not previously published. In some cases, when possible, primary authors were contacted for further information about research design, clarification of statistical data, or broader explanation of findings. In some cases, when contact was not possible, the data summarized here is limited to that which was previously published or presented. It should be noted that all tables from previous publications are reproduced with the permission of the respective author or publisher.