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171.
A theory of justice for the basic structure of society may constrain though not directly govern colleges. The principle of "equal opportunity" commonly applied to jobs either does or does not apply to varsity opportunities. If it applies, it interdicts sex discrimination but, one fallacious argument notwithstanding, it states no obligation to expend resources on new teams. If it does not apply, an analogue of Rawls's difference principle may appropriately constrain inequalities between the sexes. In either case the preferences of a majority of the sex affected by any inequality are pivotal in fashioning any tenable distributive policy. Those preferences are neglected by a government policy that assimilates equal opportunity to equality of (i) the ratio of male:female varsity athletes and (ii) the ratio of male:female students. It is argued that such policy rests on affirming the consequent. Its effects include misallocations of resources and overvaluation of athletics. It is argued that what should approximately be equal is competitive access, the ratio of available positions to aspirants, for each sex. Two versions of a principle of equal competitive access are proposed, the recommended one of which pertains to teams whose net consumption of resources is positive. 相似文献
172.
Stanley L. Sclove 《Psychometrika》1987,52(3):333-343
A review of model-selection criteria is presented, with a view toward showing their similarities. It is suggested that some problems treated by sequences of hypothesis tests may be more expeditiously treated by the application of model-selection criteria. Consideration is given to application of model-selection criteria to some problems of multivariate analysis, especially the clustering of variables, factor analysis and, more generally, describing a complex of variables. 相似文献
173.
Huynh Huynh 《Psychometrika》1980,45(1):107-120
This paper describes an asymptotic inferential procedure for the estimates of the false positive and false negative error rates. Formulas and tables are described for the computations of the standard errors. A simulation study indicates that the asymptotic standard errors may be used even with samples of 25 cases as long as the Kuder-Richardson Formula 21 reliability is reasonably large. Otherwise, a large sample would be required.This work was performed pursuant to Grant No NIE-G-78-0087 with the National Institute of Education, Department of Health, Education and Welfare, Huynh Huynh, Principal Investigator. Points of view or opinions stated do not necessarily reflect NIE position or policy and no official endorsement should be inferred. The editorial assistance of Joseph C. Saunders is gratefully acknowledged. 相似文献
174.
Andreea Butucescu Dragoș Iliescu 《International Journal of Selection & Assessment》2018,26(2-4):196-201
The present paper tackles a problem in the candidate reactions literature: the replicability of results that emerge when using in vivo and in vitro designs. The current study was designed to provide a conceptual replication of a dynamic model of change in fairness perceptions during the hiring process, using a different research design, different measures, and a different sample than the original paper. A sample of 209 participants in a simulated selection process reported their level of perceived fairness three times: before the testing, after the testing, and after the results were communicated. These results support the results of the original that the construction of fairness perceptions declines in a nonlinear way over time, with high initial levels of fairness perception corresponding to a lower rate of decline, and vice versa. Further analysis revealed no change in the individuals’ conceptualization of perceived fairness nor any shift in the respondents’ use of the measurement scale (i.e., no beta and gamma change were detected). 相似文献
175.
Maria Nordfang 《Visual cognition》2018,26(4):285-298
In “hybrid” search, observers search a visual display for any of several targets held in memory. It is known that the contents of the memory set can guide visual search (e.g., if the memorized targets are all animals, visual attention can be guided away from signs). It is not known if the visual display can guide memory search (e.g., if the memory set is composed of signs and animals, can a visual display of signs restrict memory search to just the signs?). In three hybrid search experiments, participants memorized sets of items that belonged to either one or several categories. Participants were then presented with visual displays containing multiple items, also drawn from one or several categories. Participants were asked to determine if any of the items from their current memory set were present in the visual display. We replicate the finding that visual search can be guided by the contents of memory. We find weaker, novel evidence that memory search can be guided by the contents of the visual display. 相似文献
176.
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178.
为探讨粘附分子CD18、CD54和血小板CD62、CD63表达变化与急性脑梗塞(ACI)发病之间的关系,本文应用流式细胞仪(FCM)检测了52例ACI患者治疗前后CD18、CD54与CD62p、CD63两者的表达水平,并与30例正常人作对照。结果显示,脑梗塞组治疗前两者的表达水平均明显上调,与正常对照组比较均有显著差异... 相似文献
179.
35例大面积脑梗死患者,其中18例采用外科手术治疗(大骨瓣减压术),内科治疗17例,治疗后1、6个月以格拉斯哥预后评分(GOS)和Barthel指数记分法评定临床疗效,手术组比内科治疗组的死亡率及重残率明显降低(P〈0.01),有统计学意义。由此,探讨大面积脑梗死的手术时机及治疗效果。 相似文献
180.
《Quarterly journal of experimental psychology (2006)》2013,66(10):1991-2013
When making inferences, people are often confronted with situations with incomplete information. Previous research has led to a mixed picture about how people react to missing information. Options include ignoring missing information, treating it as either positive or negative, using the average of past observations for replacement, or using the most frequent observation of the available information as a placeholder. The accuracy of these inference mechanisms depends on characteristics of the environment. When missing information is uniformly distributed, it is most accurate to treat it as the average, whereas when it is negatively correlated with the criterion to be judged, treating missing information as if it were negative is most accurate. Whether people treat missing information adaptively according to the environment was tested in two studies. The results show that participants were sensitive to how missing information was distributed in an environment and most frequently selected the mechanism that was most adaptive. From these results the authors conclude that reacting to missing information in different ways is an adaptive response to environmental characteristics. 相似文献