부산대학교 도서관

The content, form, structure and functional characteristics of intrusive thinking were studied in a group of sixty adult subjects. The content and form of these intrusive activities resembled obsessions but were less intense and less disturbing. The intrusive thoughts, images and impulses shared important features but some differences were noted. Analysis of the intrusions yielded two major factors, distressing qualities and controllability. The dismissability of intrusions was related to their intensity and distressing qualities. A surprisingly large proportion of intrusions were triggered by external precipitants.