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1.
In the first experiment, 4 pigeons were each presented with a recurring sequence of four key colors followed by the delivery of grain (block clock). Once the rate of pecking had stabilized, three of the colors were replaced, during different series of sessions, by a darkening of the key. The rate of pecking was reduced within those segments of the interval between deliveries of food during which the key was dark; when the key was dark during the final portion of the interval, rates were reduced throughout the entire interval. In the second experiment, 3 new pigeons were exposed to a different sequence of colors, and the final stimulus was replaced in successive conditions by a novel color, a darkened key, and a restoration of the original color. The data indicated that darkening the key had a more severe, more extensive, and more persistent effect than did a mere change in color. These results suggest that it may be fruitful to conceptualize the autoshaping procedure as a special version of the block clock in which pecking is suppressed throughout the greater part of the interval by darkening the key. In the final condition, the same stimulus appeared in each of the last three portions of the interval. The rate of pecking was lower during the last two portions than when distinctive colors were presented, with the peak rate now appearing in the fifth of seven equal temporal components.  相似文献   
2.
Two experiments were carried out in which children's sensitivity to changes in reinforcer density (number of reinforcers per session) was measured in a choice paradigm. In Experiment 1, 24 girls (ages 6, 9, and 12 years) performed on concurrent-chain schedules of reinforcement. The initial links were variable-interval 10-s schedules. One terminal link always gave three tokens after 30 s, but the parameters associated with the other were varied. Independent manipulations of reinforcer size (two tokens or four tokens) and prereinforcement delay (25 s or 65 s) led to equal changes in the relative density of tokens that could be earned on the schedules. Subjects at all ages were sensitive to changes in reinforcer density brought about by changes in reinforcer size, whereas only 3 12-year-olds showed sensitivity to the changes brought about by manipulation of prereinforcer delay. In Experiment 2, titration procedures were used to test the extent of this insensitivity to delay in 32 6- and 12-year-old children. In these procedures, a repeated choice of the large reinforcer increased the delay to its delivery, and a repeated choice of the small reinforcer reduced the delay to the delivery of the large reinforcer. Whereas 6-year-old boys and girls tended to maintain a strong preference for the large reinforcer, so increasing the delay to its delivery, 12-year-olds tended to distribute their responses to both alternatives, thus producing a stable level of delay to the large reinforcer. The results from the two experiments support the idea of two stages in the development of adaptive intertemporal choice.  相似文献   
3.
Ruth Marcus 《Psychometrika》1978,43(1):133-139
A general method of devising stepwise multiple testing procedures with fixed experimentwise error is applied to the problem of non-parametric randomized block design with ordered alternatives. In addition, the method is applied to other models with ordered alternatives.The author wishes to thank the referees for helpful suggestions.  相似文献   
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探讨全麻喉罩复合硬膜外阻滞麻醉对腹腔镜胆囊切除患者眼内压(IOP)的影响,60例患者行腹腔镜胆囊切除患者根据麻醉方式的不同随机分为全麻喉罩复合硬膜外阻滞组(A 组)与气管插管全麻组(B 组),每组各30例。记录麻醉前(T0)、气管插管(置入喉罩)前(T1)、气管插管(置入喉罩)后即刻(T2)、CO2气腹后10min(T3)、术毕患者清醒拔除气管导管(喉罩)前(T4)时的 IOP 。结果显示:喉罩全麻复合硬膜外阻滞用于腹腔镜胆囊切除,与单纯气管插管全麻比较,可有效降低患者在诱导插管、CO2气腹与患者清醒吸痰、拔管所引起的 IOP 升高反应(P<0.05)。  相似文献   
6.
Autocorrelation and partial autocorrelation, which provide a mathematical tool to understand repeating patterns in time series data, are often used to facilitate the identification of model orders of time series models (e.g., moving average and autoregressive models). Asymptotic methods for testing autocorrelation and partial autocorrelation such as the 1/T approximation method and the Bartlett's formula method may fail in finite samples and are vulnerable to non-normality. Resampling techniques such as the moving block bootstrap and the surrogate data method are competitive alternatives. In this study, we use a Monte Carlo simulation study and a real data example to compare asymptotic methods with the aforementioned resampling techniques. For each resampling technique, we consider both the percentile method and the bias-corrected and accelerated method for interval construction. Simulation results show that the surrogate data method with percentile intervals yields better performance than the other methods. An R package pautocorr is used to carry out tests evaluated in this study.  相似文献   
7.
Egil Asprem 《Religion》2016,46(2):158-185
The article introduces a framework for preparing complex cultural concepts for the cognitive science of religion (CSR) and applies it to the field of Western esotericism. The research process (‘reverse engineering') rests on a building block approach that, after problematic categories have been deconstructed, seeks to reconstruct new scholarly objects in generic terms that can be operationalized in interdisciplinary contexts like CSR. A four-step research process is delineated, illustrated by a short discussion of previous work on ‘Gnosticism,' ‘magic,' and ‘religion,' before applying it to ‘esotericism.' It is suggested that the implicit scholarly objects of esotericism scholarship can be reconstituted in generic terms as concerned with processes of creating and disseminating ‘special knowledge.' Five definitional clusters are identified in the literature; these provide a basis for formulating research programs on the psychological and cognitive level, drawing on metarepresentational processes, event cognition, and psychological dispositions for altering experience.  相似文献   
8.
霍桂桓 《现代哲学》2004,22(4):103-111
怎样才能提升翻译研究的理论水平?进行翻译理论研究是不是必须诉诸康德的先验哲学框架?本文认为,作为王宾教授所谓“不可译性”之理论前提的康德哲学“经验VS先验”的基本观点,其实并不适合于进行翻译理论研究;实际上,这里的根本问题是“翻译的实际经验性行为”与“翻译标准”之间的关系。只有从我自己构建并逐渐完善的社会个体生成论的角度出发,把翻译研究所涉及的历时性维度与共时性维度有机结合起来,正确处理翻译技巧、翻译理想和翻译标准之间的关系,我们才能正确地认识“翻译标准”及其形成过程,从而使之发挥适当的作用,达到逐步提高翻译理论研究水平的目的。  相似文献   
9.
万毅 《现代哲学》2007,51(1):118-122
该文对唐末五代时期“禅宗五家”之一云门宗创始人文偃的禅学思想进行了初步分析,指出了其宗教哲学的客观唯心主义本质,同时也揭示了其“机锋”的反理性、反逻辑、反知识的特点。  相似文献   
10.
A method is developed to investigate the additive structure of data that (a) may be measured at the nominal, ordinal or cardinal levels, (b) may be obtained from either a discrete or continuous source, (c) may have known degrees of imprecision, or (d) may be obtained in unbalanced designs. The method also permits experimental variables to be measured at the ordinal level. It is shown that the method is convergent, and includes several previously proposed methods as special cases. Both Monte Carlo and empirical evaluations indicate that the method is robust.This research was supported in part by grant MH-10006 from the National Institute of Mental Health to the Psychometric Laboratory of the University of North Carolina. We wish to thank Thomas S. Wallsten for comments on an earlier draft of this paper. Copies of the paper and of ADDALS, a program to perform the analyses discussed herein, may be obtained from the second author.  相似文献   
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