The perception of depth and slant from texture in three-dimensional scenes.

The perception of depth and slant in three-dimensional scenes specified by texture was investigated in five experiments. Subjects were presented with computer-generated scenes of a ground and ceiling plane receding in depth. Compression, convergence, and grid textures were examined. The effect of the presence or absence of a gap in the center of the display was also assessed. Under some conditions perceived slant and depth from compression were greater than those found with convergence. The relative effectiveness of compression in specifying surface slant was greater for surfaces closer to ground planes (80 degrees slant) than for surfaces closer to frontal parallel planes (40 degrees slant). The usefulness of compression was also observed with single-plane displays and with displays with surfaces oriented to reduce information regarding the horizon.     

CHANGE IN SELF‐IMAGE AND PTSD SYMPTOMS IN SHORT‐TERM THERAPIES WITH TRAUMATIZED REFUGEES

In this study, an attempt was made to evaluate changes in the self‐image of traumatized refugees receiving short‐term psychotherapy. Fourteen clients with war and torture experiences were followed during and after trauma‐focused therapies with self‐rating instruments. Outcome was measured with SCL‐90, measuring overall psychiatric symptoms, and with PTSS‐10, measuring Post‐traumatic Stress Disorder (PTSD) symptoms. Self‐image was measured with Structural Analysis of Social Behavior (SASB). The analyses showed considerable remission of both general psychiatric and PTSD‐related symptoms, but more moderate changes in self‐image aspects. The positive aspect of the self‐image was virtually non‐related to the symptom measures and did not change after the termination of the therapy; the negative aspect of the self‐image was more strongly related to the symptoms and changed mainly on the last measurement occasion, 15 months after the therapy end. When clients with good and poor outcome were compared, it was found that those with good outcome had higher initial levels on both the positive and the negative aspects of the self‐images. This was tentatively interpreted as indicating that clients who had invested more energy in their self‐image were better able to utilize the therapy. Different development in the self‐image for these two groups indicated that for some clients, the treatment process might have entailed too much strain.     

Health psychology's contribution to addressing the cancer problem: update on accomplishments

Each year approximately 1.5 million Americans are stricken with or die from cancer. In recent years, more psychologists have begun study of the psychological and behavioral aspects of cancer, and the rate, quality, and integration of findings are accelerating. This article provides an update on the major areas of accomplishment, with the findings grouped into disease-relevant time points.