A longitudinal study of pain sensitivity and blood pressure in adolescent boys: results from a 5-year follow-up.

A growing literature has observed a significant reduction in pain sensitivity among hypertensive animals and humans. It is uncertain whether a reduced sensitivity to pain can be observed in nonnotensive individuals who go on to develop high blood pressure. Blood pressure (BP) was reassessed in one hundred fifteen 19-year-old boys initially tested at age 14, when they were also presented with a pain stimulus (mechanical finger pressure). Hierarchical regression analyses indicated that information regarding pain tolerance improved prediction of changes in systolic and diastolic blood pressure beyond that afforded by differences in BP at age 14, parental history of hypertension, and body mass index. These analyses suggest that pain sensitivity may be associated with physiological processes involved in the development of sustained high blood pressure.     

Head-centred meridian effect on auditory spatial attention orienting

Six experiments examined the issue of whether one single system or separate systems underlie visual and auditory orienting of spatial attention. When auditory targets were used, reaction times were slower on trials in which cued and target locations were at opposite sides of the vertical head-centred meridian than on trials in which cued and target locations were at opposite sides of the vertical visual meridian or were not separated by any meridian. The head-centred meridian effect for auditory stimuli was apparent when targets were cued by either visual (Experiments 2, 3, and 6) or auditory cues (Experiment 5). Also, the head-centred meridian effect was found when targets were delivered either through headphones (Experiments 2, 3, and 5) or external loudspeakers (Experiment 6). Conversely, participants showed a visual meridian effect when they were required to respond to visual targets (Experiment 4). These results strongly suggest that auditory and visual spatial attention systems are indeed separate, as far as endogenous orienting is concerned.     

THE DEVELOPMENT OF STRATEGIES IN EMBEDDED FIGURES TASKS*

The starting point of the investigation was the field dependence-independence construct as measured with the Embedded Figures Test of H.A. Witkin. An overview of the research on the information-processing strategies in solving the items of this test was converging into a theory in which strategies for a successful solution can be located on a bipolar dimension with at one extreme a simultaneous strategy and at the other extreme a successive strategy. A new administration procedure for evaluating the use of four solution strategies was developed: the simultaneous, the successive, the extemalized-successive and the global-manipulatory strategy. Based on the prediction that the use of strategies was related to sex and age, we carried out an experiment involving groups of ten boys and ten girls of 5, 6 and 7 years of age, who were given eight tasks with the new administration procedure. No. significant difference was found between boys and girls. However, significant differences existed in strategy profiles in six of the eight tasks between the three age groups.