This special edition of Rorschachiana is a celebration of the centenary of the publication in 1921 of Hermann Rorschach's book Psychodiagnostics. Authors were invited to submit review articles that summarize the research in particular areas of study. The aim is to offer an update on the White Paper from the Society of Personality Assessment that was published in 2005 in response to criticisms of the Rorschach that called for a moratorium on the use of the test in clinical practice. Based on a review of the scientific literature, the White Paper concluded "the Rorschach possesses documented reliability and validity similar to other generally accepted test instruments used in the assessment of personality and psychopathology and that its responsible use in personality assessment is appropriate and justified" (Society for Personality Assessment, 2005, p. 221).The question to authors was, "What does the scientific literature from 2005 to the present tell us now about the reliability and validity of the Rorschach as a tool for the assessment of personality?" Then, in order to broaden the discussion and reach out to the wider psychological community, each article was sent to another psychologist with specialist knowledge on the topic. The discussants were invited to comment on how the Rorschach literature informed their area of practice.Nancy Kaser-Boyd gives us an update on the research into how the patient's experience of trauma is manifested on the Rorschach (Kaser-Boyd, 2021). She discusses the two main symptom clusters of avoidance and intrusions and links these to "constricted" and "flooded" protocols. There are sections on torture, interpersonal abuse, and combat trauma. She also considers the research on malingering. The discussant for this article is Steven Gold and he writes convincingly about the value of the patient's experience being given full rein in the test (Gold, 2021).In a very different vein, Koji Jimura, Tomoki Asari, and Noriko Nakamura plunge into neurophysiological studies of brain functioning during the administration of the Rorschach and provide fascinating links between individual differences in particular Rorschach scores and patterns of brain activity, looking at the human movement response, achromatic determinants, form quality, chromatic responses, oral dependent responses, and complexity (Jimura et al., 2021).