The role of apparent distance in the Poggendorff illusion

This study was designed to test the hypothesis that apparent shrinkage of the distance between the oblique lines is responsible for the Poggendorff illusion. The results from one experiment, which provided an indirect test by increasing the length of the oblique arm, supported the shrinkage hypothesis. However, a second experiment, in which apparent distance was measured directly, did not support the hypothesis. Instead, the distance between the oblique lines appeared longer than a control distance. It was concluded that the argument, made by assimilation theory, that the Poggendorff illusion is caused by changes in the apparent distance between oblique lines must be reassessed.     

Visual selection: The effects of number of encodable elements and physical complexity

Attention, Perception, & Psychophysics - Research in the area of visual selection has consistently demonstrated that viewing time increases with the complexity of the stimuli. A theoretical...     

Clause structure of sentences and speech processing

Listeners heard narrative stories in segments 20-60 sec long, and wrote their immediate recall for the most recent speech in each segment. Segments ended in four ways: there was a main clause alone, a subordinate clause alone, a main clause preceding a subordinate clause, or a subordinate clause preceding a main clause. Only these final sentences were well recalled. Of these, single-clause sentences were recalled best and two-clause sentences with main-subordinate clause order were recalled worst. An interaction obtained between clause position and function suggests that processing may be delayed when sentences fall to begin with main clauses.     

Social communication patterns of attention-deficit-disordered boys

This study was designed to compare the social communication patterns of attention-deficit-disordered (ADD) and normal boys. This was accomplished by employing a TV Talk Show social role-playing procedure in which the task required different strategies for the roles of host and guest. Groups of ADD and normal elementary-age boys were formed, and each boy was paired with a normal classmate. Measures of communication competence were coded from videotapes made of subject and partner social interactions while performing both roles. Results indicated that the ADD boys, in contrast to the control group, failed to modulate their social communication behaviors as task demands shifted. Additionally, the behavior of the ADD boys resulted in their normal partners' altering their response patterns in order to maintain the equilibrium in the dyadic interaction. These results suggest that the social behavior of ADD children is relatively independent of environmental requirements and may contribute to the inappropriate responding of others.     

A community program to reward children's use of seat belts

This paper reports on a community-wide effort to increase elementary school children's use of seat belts. Twenty-five schools serving over 9,000 children participated in a program of rewards (stickers, bumper strips, and chances on pizza dinners) administered by parent-teacher organization volunteers. Comprehensive observations were made at three representative schools. Categorization of compliance with safety rules required all passengers to be buckled into safety devices before the children received the rewards. The rewards, on average across schools, increased compliance from baseline of 18.1% to 62.4% during the interventions. Withdrawal of the rewards resulted in a decrease to 49% compliance, but this rate remained above baseline. The involvement of community groups and institutions in this safety program is highlighted.     

Counselling breast cancer patients: A specialist nurse service

The evaluation of a specialist nurse-counselling service is described. Forty newly diagnosed breast cancer patients, treated by mastectomy, were randomised to receive either routine care or routine care plus counselling by a nurse. Psychological morbidity was assessed at one week, 3 months and 12 months postoperatively to determine the efficacy of this service. Comparisons between the groups indicated that counselled patients were significantly less depressed at 3 months postoperatively and reported more beliefs in personal control over health. At 12 months postoperatively there were no significant differences between the groups. Although both groups continued to adjust throughout the year following surgery, this adjustment occurred more rapidly if patients were counselled. The results suggest that a nurse-counselling service can be of value in helping to reduce the amount of distress experienced as a result of the diagnosis and treatment of breast cancer.