Spatial visualization and sex differences in quantitative ability

The hypothesis that sex differences in spatial visualization ability might account for sex differences in mathematical ability was supported for a group of 183 male and 81 female college students. With spatial visualization statistically controlled, no significant sex differences in Quantitative Scholastic Aptitude Test (QSAT) scores was found; including sex as a predictor variable increased the variance explained by less than 1%. Although the slope of the regression of mathematics on spatial visualization did not differ as a function of sex, males were somewhat more predictable than females. As the OSAT of both males and females high on spatial visualization was more predictable than the QSAT of those scoring less well, it appears that the sex difference in predictability is due to males having higher spatial ability than females.     

Piagetian tasks measure intelligence and intelligence tests assess cognitive development: A reanalysis

A reanalysis of the intercorrelations of Wechsler subtests, achievements tests, and Piagetian tasks originally published by Stephens et al. (1972) has corrected errors in the original design and has used models which allow both differences and similarities to appear. Unit weighted composites of the two sets of tests were formed after first partialling chronological age out of the complete table of intercorrelations. The correlation between the composites is .876 which corrects, using split-half estimates of reliabilities, to .918. Next the matrix of partial correlations was factored and the factors rotated to a hierarchical structure. Piagetian tasks contribute almost equally to the definition of the general factor in intelligence along with the Wechsler subtests and the achievement tests. The general factor, furthermore, makes the single largest contribution to the variance of most of the measures of both sets. The smaller group factors consist of an Academic Achievement factor and three Piagetian factors. Of the latter the largest and most clearly identified is the factor called Operational Thought in the earlier analysis, but is here described simply as Conservation. It is concluded that the evidence for communality in function far outweighs the differences between intelligence tests and Piagetian tasks.     

诺贝尔医学奖与美国人的情结

通过对美国历年来获得诺贝尔医学奖项目和获奖者的分析,发现美国有获奖者多、原创性成果多、基础前沿研究成果多、出自一流科研机构的获奖者多的"四多"现状.美国的获奖历史和现状带给了我们许多哲学思考.     

近五十年美国医疗保健制度演进对我国医疗制度改革的启示

通过对美国自1945年以来50余年医疗保健制度演进的研究。涵概了四个发展时期;民办医疗保险体制;公办免费医疗保健制度和健康维持组织;医疗费用控制政策的实施;医疗保健制度的全面改革,以求对我国从计划经济向市场经济转轨后,医疗保健制度的改革提供借鉴。     

Relationship between eight physiological variables and severity of stuttering

The results of this study illustrated the primacy of individual differences in the relationship between physiological responses before speech and stuttering severity.     

Between daʿwa and Dialogue: Religious Engagement in Muslim-minority Environments

ABSTRACT

Muslim engagement in interfaith and intercultural dialogue began in earnest after the turn of the twenty-first century in response to the rise of global jihad. Both dialogue and jihad are outgrowths of da?wa, the call or mission of Islam, the principal mode of modern Islamic activism. The foundations were laid in the later part of the twentieth century by Muslim intellectual-activists living in non-Muslim environments, who played a special role in conceptualizing the new notion of dialogue and its relation to da?wa. This essay focuses on four pioneering figures, two from the indigenous context of India – the modernist Asghar Ali Engineer and the reformist ?ālim Wahiduddin Khan, and two from the diaspora milieu of the West – the Palestinian-American academic activist Ismail Raji al-Faruqi and the European Muslim spokesman Tariq Ramadan. Each represents a distinct religious orientation that also reflects a different phase in the evolution of modern Islamic discourse. Taken together, these intellectual-activists chart the trajectory of modern Islam from the early pre-Islamist liberal hopes to the present post- and neo-Islamist efforts to navigate between Western-dominated globalization and Islamist jihadism.     

Simulating a skilled typist: a study of skilled cognitive-motor performance

We review the major phenomena of skilled typing and propose a model for the control of the hands and fingers during typing. The model is based upon an Activation-Trigger-Schema system in which a hierarchical structure of schemata directs the selection of the letters to be typed and, then, controls the hand and finger movements by a cooperative, relaxation algorithm. The interactions of the patterns of activation and inhibition among the schemata determine the temporal ordering for launching the keystrokes. To account for the phenomena of doubling errors, the model has only “type” schemata—no “token” schemata—with only a weak binding between the special schema that signals a doubling, and its argument. The model exists as a working computer simulation and produces an output display of the hands and fingers moving over the keyboard. It reproduces some of the major phenomena of typing, including the interkeystroke interval times, the pattern of transposition errors found in skilled typists, and doubling errors. Although the model is clearly inadequate or wrong in some of its features and assumptions, it serves as a useful first approximation for the understanding of skilled typing.