| Summary: | Background Although childhood endangerment often precedes adult posttraumatic stress disorder (PTSD), the mechanism from danger to disorder is unclear. We proposed a developmental process in which unprotected and uncomforted danger in childhood would be associated with “shortcuts” in information processing that, in adulthood, could result in PTSD if the adult experienced additional exposure to danger. Information processing was defined as the basic associative, dissociative, and integrative processes used by all humans. Individual differences in parents’ (or primary caregivers’) protective and comforting behavior were expected to force unprotected children to use psychological shortcuts that linked early trauma to later vulnerability for PTSD. Method We compared 22 adults with chronic PTSD to (a) 22 adults with other psychiatric diagnoses and (b) 22 normative adults without any diagnosis, in terms of information processing around childhood danger. The Adult Attachment Interview was used to derive information processing variables, including self-protective strategies, childhood traumas, and depression. Results The two patient groups differed from the normative group on all variables. Adults with chronic PTSD differed from other psychiatric patients in having more childhood traumas and using more transformations of associative and dissociative processes. Within the PTSD group, there were three psychologically different subgroups. Conclusion Our findings suggest that (1) prediction of risk for adult PTSD may be possible, (2) treatment might be facilitated by provision of a protective and supportive therapist, (3) who included a focus on correction of information processing errors and use of more adaptive strategies, and (4) subgroups of adults with PTSD may require different forms of treatment.
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