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61.
In order to improve the distribution system for the Nordic countries the BASF AG considered 13 alternative scenarios to the existing system. These involved the construction of warehouses at various locations. For every scenario the transportation, storage, and handling cost incurred was to be as low as possible, where restrictions on the delivery time were given. The scenarios were evaluated according to (minimal) total cost and weighted average delivery time. The results led to a restriction to only three cases involving only one new warehouse each. For these, a more accurate model for the cost was developed and evaluated, yielding results similar to a simple linear model. Since there were no clear preferences between cost and delivery time, the final decision was chosen to represent a compromise between the two criteria. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
62.
The present study tested the hypothesis that a load perturbation facilitates interpersonal compensation for force error. Ten groups performed both control and perturbation conditions. In the control condition, a target discrete peak force was the sum of 10% of the maximum voluntary contraction produced by two participants. In the perturbation condition, two cooperative participants a and b produced the same target force as the control condition, and the force produced by a non-cooperative participant c increased or decreased the total forces produced by participants a and b. The load perturbation facilitated interpersonal compensation for force error but negatively affected performance during joint action. The participants further learned to improve the error compensation over experimental blocks in the perturbation condition. 相似文献
63.
Tim Kühl Franziska Moersdorf Michelle Rmer Stefan Münzer 《Applied cognitive psychology》2019,33(1):48-61
According to the seductive detail effect, adding interesting but irrelevant information (i.e., seductive details) can be detrimental to learning success. In this study, it was explored within two experiments whether the valence of text‐based seductive details might affect learning outcomes differently. For Experiments 1 and 2, we pretested text‐based seductive details for their emotional valence (n = 32 or n = 25 students, respectively). For the main studies of Experiments 1 (n = 105) and 2 (n = 131), university students were randomly assigned to one of four conditions that varied with respect to the presence of seductive details and their emotional valence (no vs. positive vs. negative vs. neutral). Unexpectedly, results revealed in both experiments no seductive details effect and also no differences between the three seductive detail conditions for the used learning outcome measures retention and transfer. Possible reasons for these findings and their implications are discussed. 相似文献
64.
拼音文字文本阅读研究发现,同青年人相比,老年人在阅读过程中有更多的跳读发生、向前眼跳幅度更长、回视次数更多。基于这些研究结果,研究者提出了老年人阅读的“风险阅读”策略。为探究在中文阅读过程中老年人的加工特点以及与拼音文字阅读的策略异同,实验采用镜像和正常两种方式呈现文本进行了考察。结果发现,在中文阅读过程中,相较于青年人,老年人的跳读率更低,向前眼跳幅度更小,采用的是一种更为谨慎的阅读策略。在镜像呈现的条件下,老年人与青年人之间的跳读率没有显著差异,在正常呈现的条件下,老年人的跳读率显著低于青年,表明在汉语阅读中老年人采取更加谨慎的阅读策略与其副中央凹加工能力下降,以及汉语与拼音文字两种不同书写系统的基本属性有关。 相似文献
65.
教学设计是为优化教学效果而形成的教学实施方案。为提高学习表现,认知负荷理论认为在组织教学设计时需考虑内、外认知负荷两大因素,但少有研究关注学生在学习过程中的体验。本研究通过单词复合性操纵内在负荷,通过呈现方式操纵外在负荷,探究两类负荷对心流体验及表现的影响。结果发现,内在负荷对心流及表现均有影响,外在负荷仅在低水平组表现出对心流及表现的影响,另外内外负荷在低水平组的表现上存在交互作用。结果表明,教学设计中的内在负荷是影响心流及表现的稳定因素,外在负荷不仅受知识水平影响,其对表现的有效性还受内在负荷的调节。 相似文献
66.
The purpose of this study was to expand on research on treatments for stereotypy by evaluating the effects of response interruption and redirection (RIRD) and response cost (RC) alone and as a treatment package on vocal stereotypy. Treatment phases included RIRD, RC, and response interruption and redirection plus response cost (RIRD + RC). The efficacy of these treatments was determined by measuring duration of stereotypy in session and during treatment intervals. Vocal stereotypy decreased in all three treatment conditions; however, when data analysis included stereotypy occurring during treatment intervals, stereotypy during the RC condition occurred at similar levels as baseline for one treatment evaluation phase for Karl and both treatment evaluations phases for Jon. We discuss implications of these findings, limitations of the current study, and areas for future research. 相似文献
67.
68.
读者能够从副中央凹中提取到什么类型的信息, 是当前阅读眼动研究领域关注的焦点问题.当前普遍认为低水平信息(如正字法信息)可以在副中央凹中得以加工, 但是高水平的信息(如语义和句法信息)能否从副中央凹中进行提取存在争议.本文总结了近年来高水平信息在副中央凹加工的研究进展, 包括拼音文字和非拼音文字(如中文)阅读过程中语义和句法预视效益的研究现状及影响因素, 当前眼动控制模型(如E-Z读者和SWIFT)对预视效益的解释和不足之处, 最后提出未来关于语义和句法预视加工的研究方向. 相似文献
69.
沉没成本效应是指决策者的决策行为因受沉没成本影响而产生的一种非理性决策现象。针对这一决策偏差的产生根源,研究者从认知、动机和神经三个角度提出了解释。沉没成本效应的影响因素包括沉没成本特性、情境因素、个体差异和文化差异等。基于先前研究存在的问题和不足,沉没成本效应的未来研究应着眼于改进研究方法,探究产生根源,关注行为沉没成本和加强应用研究。 相似文献
70.
Georgia A. Floridou Victoria J. Williamson Lauren Stewart 《Quarterly journal of experimental psychology (2006)》2017,70(11):2189-2199
Involuntary musical imagery (INMI), i.e the internal experience of a repetitive musical fragment, is one of the most ubiquitous forms of spontaneous cognition. Findings regarding the relationship between INMI and cognitive load are conflicting. In the present study, 200 participants watched and evaluated two non-dialogue, music-only film trailers. Subsequently, they either closed their eyes for 5 min (baseline), or engaged in one of three dot tasks of varying challenge and attentional demand (low, medium, and high cognitive load). Finally, they completed a novel “Mind Activity Questionnaire”, which allows for indirect INMI sampling rather than direct questioning. The same questionnaire was completed 24 hours later. Overall, a significant negative linear trend was found. At baseline, 65% of people reported experiencing INMI. This rate decreased to 32.5% in the low load condition with further reductions observed in the medium and high conditions, which did not differ significantly from each other. INMI frequency and duration followed the same pattern as the induction rates. In the 24-hour follow-up, 21% of participants reported INMI experiences. This study supports the hypothesis that INMI occurrence, frequency, and duration relate to spare cognitive capacity and demonstrates an ecologically valid laboratory paradigm for covertly inducing and documenting INMI experiences. 相似文献