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排序方式: 共有871条查询结果,搜索用时 15 毫秒
171.
Recently, a multiple comparisons procedure was derived with the goal of determining whether it is reasonable to make a decision about which of J independent groups has the largest robust measure of location. This was done by testing hypotheses aimed at comparing the group with the largest estimate to the remaining J − 1 groups. It was demonstrated that for the goal of controlling the familywise error rate, meaning the probability of one or more Type I errors, well-known improvements on the Bonferroni method can perform poorly. A technique for dealing with this issue was suggested and found to perform well in simulations. However, when dealing with dependent groups, the method is unsatisfactory. This note suggests an alternative method that is designed for dependent groups. 相似文献
172.
针对我国重型肝炎治疗现状,对重型肝炎常用的以及部分有争议的治疗药物和方法进行分析和讨论,就如何选择治疗方案提出医疗原则,认为应采取内科治疗-人工肝-肝移植的综合治疗模式,结合患者的治疗愿望及经济承受力,理性地选择治疗方案,以期达到合理、有效和经济的目的。 相似文献
173.
Pigeons were presented with an operant simulation of two prey patches using concurrent random-ratio schedules of reinforcement. An unstable patch offered a higher initial reinforcement probability, which then declined unpredictably to a zero reinforcement probability in each session. A stable patch offered a low but unvarying reinforcement probability. When the reinforcement probability declined to zero in a single step, the birds displayed shorter giving-up times in the unstable patch when the ratio between the initial reinforcement probabilities in the unstable and stable patches was greater and when the combined magnitude of the reinforcement probabilities in the two patches was greater. When the unstable patch declined in two steps, the birds behaved as if their giving-up times were influenced heavily by events encountered during the most recent step of the double-step change. This effect was observed, however, only when the reinforcement probability in that step was .04, not when it was .06. All of these data agree with the predictions of a capture-probability model based on a comparison of the estimated probability of receiving a reinforcer in the current patch with that in alternative patches. 相似文献
174.
John C. Godbey 《Zygon》1995,30(4):541-552
Abstract. Ralph Burhoe has sought to preserve “traditional religious wisdom,” but he emphasizes science as a new revelation. His relation to philosophical positivism and his insistence on including in a scientific theology only views that reflect the scientific worldview constitute major philosophical and theological problems. This essay considers the influence of several historical precursors—Francis Ellingwood Abbot, George Burman Foster, and Shailer Mathews of the “Chicago School” of theology, Douglas Clyde Macintosh, and, especially, Henry Nelson Wieman—which has contributed to a favorable reception of Burhoe's ideas. Social problems such as the youth revolution of the 1960s and indifference to the lack of intellectual credibility of religious beliefs have, however, hindered reception of his ideas. The conclusion notes some tasks that must yet be accomplished in order to continue Burhoe's work, particularly that of increasing the general level of education in the sciences. 相似文献
175.
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
176.
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
177.
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
178.
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
179.
180.