The coordination of compensatory tracking and anticipatory timing tasks

Two experiments investigated the presence of a coordination factor in a task consisting of compensatory tracking and anticipatory timing components. The task (Intercept task) resembles a computer game in which a rocket must be aimed and fired to shoot an incoming missile. The studies were designed to determine if a coordinating ability exists above and beyond the abilities needed to perform the component tasks alone. We also investigated the nature of coordination abilities through correlations with other types of coordination tasks and measures of intelligence. Is coordination a general cognitive ability that contributes to performance in a wide range of coordination tasks, or is coordination ability task specific? Multiple regression analyses indicated the existence of a coordination ability in the Intercept task. This coordination ability, however, was shown to be unrelated to the coordination of visual and linguistic processing and to psychometric measures of intelligence as assessed by the Armed Services Vocational Aptitude Battery (ASVAB). Coordination of visual and linguistic processing correlated with a component of the ASVAB measuring perceptual speed. We conclude that, although the ability to integrate separate components of a complex task draws on a coordination ability, this ability is domain specific and thus varies depending on the nature of the component tasks.     

Death,medicine & bioethics

The assumptions of philosophy need scrutiny as much the assumptions of medicine do. Scrutiny shows that the philosophical method of bioethics is compromised, for it shares certain fundamental assumptions with medicine itself. To show this requires an unorthodox style of philosophy — a literary one. To show the compromised status of bioethics the paper discusses some seminal utilitarian discussions of the definition of death, of whether it is a bad thing, and of when it ought to occur.     

California Unnatural: On Fine's Natural Ontological Attitude

Abela accepts Fine's account of realism and instrumentalism, but thinks that we can reject the Natural Ontological Attitude by distinguishing the theoretical attempt to make sense of scientific practice from choosing the attitude we bring to the debate, or to science itself. But Abela's attitudes are vulnerable to Fine's criticisms of the philosophical positions. However, if we take attitude as contrastive and as full-blooded enough to lead to different behaviour we can see a gap in Fine's position. He cannot tell us why it is science that he trusts. When we look more widely, the philosophical positions might be seen as ways of justifying that trust.     

Pastoral care and miscarriage: A ministry long neglected

Ministers often are estranged from the loss experience of women who miscarry. This paper gives medical information about such spontaneous abortions, describes several factors that shape the woman's experience, and explores possible pastoral response.Swanee Hunt is a candidate for Th.D. in pastoral care and counseling at Iliff School of Theology, Denver, Colorado. She is part of an ecumenical ministry team that serves both a Presbyterian church community and a Catholic church community.     

Fear assessment in a dental analogue setting

An analogue setting for assessing dental fear involving a videotaped simulated dental operation was evaluated in terms of its capability of eliciting differential physiological arousal (Palmer Sweat Index) between high- and low-fear subjects, identified by self-reports of dental fear. Results showed high-fear subjects to exhibit significantly greater palmar sweating than did low-fear subjects, females to respond more than males, and a differential response across groups at different points during the simulated operation. High-fear subjects also gave verbal reports of greater physiological arousal and general anxiety while viewing the operation than did low-fear subjects.     

BEHAVIOR ANALYSIS IN CONSUMER AFFAIRS: ENCOURAGING DENTAL PROFESSIONALS TO PROVIDE CONSUMERS WITH SHIELDING FROM UNNECESSARY X-RAY EXPOSURE

An unobtrusive observation system was developed to determine the extent to which dental professionals in two communities provided lead shielding to patients during X-ray exams. A lengthy baseline revealed low and irregular provision of shielding among half of these professionals. Subsequently, a program was undertaken by a consumer's group in which these professionals were requested to provide shielding and were given confidential feedback regarding its use during the baseline period. The provision of shielding dramatically increased at all offices and was maintained throughout a follow-up period extending to more than 9 months after the program's implementation. Little or no generalized effect was observed in the occurrence of three collateral behaviors that were also assessed throughout the study.     

Simulation in PASCAL

Some of the author’s experiences in working with simulation languages are discussed. The use of PASCAL language is detailed.     

Individual differences in the ability to focus and divide attention

This research deals with individual differences in the ability to focus and divide attention. Eighty-five subjects performed visual search and auditory detection tasks in three conditions: single channel, focused attention, and divided attention. Reaction time (RT) was fastest in the single channel condition, intermediate in the focused attention condition, and longest in the divided attention condition, and these effects were much stronger in the auditory than the visual task. Correlations among RTs in the three conditions were very high within modality (>.88), and lower between modalities (.5 to .6). The correlational data was well fit by a model that included separate factors for the visual and auditory tasks. Measures from the three attentional conditions within each modality loaded equally on these factors. The data provided no evidence for distinct abilities to divide or focus attention.     

AN ANALYSIS AND REDUCTION OF DISRUPTIVE BEHAVIOR ON SCHOOL BUSES

Thousands of children are injured or killed each year in school bus accidents. A significant number of these tragic incidents is precipitated by disruptive child behavior that distracts the drivers from their difficult task. Two experiments were conducted which addressed this problem. For both experiments an automated sound recording device (referred to as a Noise Guard) selectively responsive to frequencies above 500 Hz (i.e., unresponsive to bus drone) recorded both the duration and frequency of noise outbursts above a tolerable threshold. Additionally, an observer made in situ measurements of other disruptions including roughhousing and getting-out-of-seat. In the first experiment, following baseline measurements of these behaviors, middle-school students received feedback for noise outbursts. That is, when “Noise Guard'” was activated, it in turn operated one of several lights on a panel visible to all passengers. Each day students were allowed to listen to high-appeal taped music while riding the bus and to participate in a raffle for prizes, provided the number of outbursts on the preceding day remained below a specified criterion indicated on the light panel. This intervention resulted in drastic reductions of noise outbursts with a concomitant reduction in other disruptive behaviors. Comparable results were obtained in the second experiment which eliminated the raffle from the intervention.