Are the leading cause of death for 15- to 20-year-olds a. suicides b. motor vehicle crashes c. gunshot wounds

“an abused child's thoughts occasionally drift to other, less anxiety-arousing topics; this anxiety reduction thus serves to strengthen 'other' thoughts, while weakening the thoughts about abuse.” a psychologist with which theoretical background would be most likely to offer this quotation as an explanation for the development of dissociative disorders?