Reports an error in "Dissociation in Posttraumatic Stress Disorder Part I: Definitions and Review of Research" by Eve B. Carlson, Constance Dalenberg and Elizabeth McDade-Montez ( Psychological Trauma: Theory, Research, Practice, and Policy, Advanced Online Publication, Apr 30, 2012, np). There was an error in the section, “Question 6: Does the Presence of High Dissociation Raise the Probability of the Presence of PTSD Symptoms at High Levels of Severity?” The paragraph that began, “Three studies that have investigated the possibility. . .” has been replaced with a paragraph that begins, “One study that is more relevant to the question. . .” All versions of this article have been corrected. (The following abstract of the original article appeared in record 2012-10976-001.) Since Janet wrote about dissociation in the early 1900s, the relationship between traumatic stress and dissociation has been discussed and debated in the fields of psychology and psychiatry. In the last 25 years, research has been conducted that allows empirical examination of this relationship and the question of how dissociative symptoms are related to posttraumatic stress disorder (PTSD). After defining the types of dissociative experiences that are considered most relevant to PTSD, we present a comprehensive and systematic review of research addressing the relationship between dissociation and traumatic stress; the rise in dissociation after traumatic stress and its subsequent decline over time; the relationship between dissociation and symptoms of PTSD in nonclinical, clinical, and PTSD samples; the conditional probability of high PTSD symptoms when dissociation level is high; the relationships among dissociation and re-experiencing, avoidance, and hyperarousal symptoms of PTSD; and biological studies of dissociation in PTSD. (PsycInfo Database Record (c) 2022 APA, all rights reserved) (Source: journal abstract)