Joaquin experiences a sharp pain in his side when he runs for an extended time. what can prevent joaquin from experiencing side stitches in the future

“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?