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With the advent of web-based technology, online testing is becoming a mainstream mode in large-scale educational assessments. Most online tests are administered continuously in a testing window, which may post test security problems because examinees who take the test earlier may share information with those who take the test later. Researchers have proposed various statistical indices to assess the test security, and one most often used index is the average test-overlap rate, which was further generalized to the item pooling index (Chang & Zhang, 2002, 2003). These indices, however, are all defined as the means (that is, the expected proportion of common items among examinees) and they were originally proposed for computerized adaptive testing (CAT). Recently, multistage testing (MST) has become a popular alternative to CAT. The unique features of MST make it important to report not only the mean, but also the standard deviation (SD) of test overlap rate, as we advocate in this paper. The standard deviation of test overlap rate adds important information to the test security profile, because for the same mean, a large SD reflects that certain groups of examinees share more common items than other groups. In this study, we analytically derived the lower bounds of the SD under MST, with the results under CAT as a benchmark. It is shown that when the mean overlap rate is the same between MST and CAT, the SD of test overlap tends to be larger in MST. A simulation study was conducted to provide empirical evidence. We also compared the security of MST under the single-pool versus the multiple-pool designs; both analytical and simulation studies show that the non-overlapping multiple-pool design will slightly increase the security risk. 相似文献
223.
A speeded item response model is proposed. We consider the situation where examinees may retain the harder items to a later test period in a time limit test. With such a strategy, examinees may not finish answering some of the harder items within the allocated time. In the proposed model, we try to describe such a mechanism by incorporating a speeded-effect term into the two-parameter logistic item response model. A Bayesian estimation procedure of the current model using Markov chain Monte Carlo is presented, and its performance over the two-parameter logistic item response model in a speeded test is demonstrated through simulations. The methodology is applied to physics examination data of the Department Required Test for college entrance in Taiwan for illustration. 相似文献
224.
By differentiating “ambivalent” from “univalent” voters, this study argues that ambivalent voters need information to reach a decision, which implies they are more open to persuasion through media coverage than are univalent voters. In turn, they may infer that election coverage exerts a greater influence on them, resulting in smaller self–other perceptual discrepancies in terms of their coverage susceptibility. Conversely, univalent voters have made their voting choices early during the campaign; for them, only when the intended influence seems desirable does the perceived influence of campaign news on them increase, leading to a smaller self–other perceptual gap. In other words, ambivalent voters engage in motivated inferences to reduce their ambivalence-aroused discomfort, whereas univalent voters engage in motivated inferences to avoid dissonance. The results of a survey conducted during the official campaign for the 2012 Taiwanese presidential election support these predictions, demonstrating the utility of categorizing voters as ambivalent or univalent when examining the perceived effects of election campaign news. 相似文献
225.
Chih-Hui Chang Nicholas Stergiou Jeff Kaipust Eric Haaland Yi Wang Fu-Chen Chen 《Ecological Psychology》2015,27(1):87-101
Stationary and moving surfaces impose different constraints on walking. In this study we investigated within-participants differences between walking on a ship before (at the dock) and during (at sea) a sea voyage. Four individuals participated in the study. While on the ship they wore a tri-axial accelerometer (ActiGraph GT3X+; ActiGraph LLC, Pensacola, FL) on their waists. Activity data were sampled at 30 Hz. Data were collected on the day before the voyage began and on several days at sea. The number of steps per day was greater at the dock than at sea. The net resultant force per day also was greater at the dock than at sea. However, resultant force per step was greater at sea (79.97 ± 8.50 vector magnitude counts/step) than on land (62.94 ± 10.03 vector magnitude counts/step). In addition, we observed variations in resultant force per step across days at sea. Ship motion decreased overall activity but increased the force per step. 相似文献
226.
Economic and psychological studies have determined the tendency to improve cooperation in initial interactions in which people are required to contribute in public good games. The current study examined the behavioural changes of individuals during finite interaction times. Participants were invited to make decisions twice in a step‐level public good game, and their belief in achieving the collective interest was measured. Participants were divided into three groups based on their first decisions. Results showed that high contributors demonstrated high levels of contribution in their subsequent interactions, whereas low and equal contributors increased their levels of contribution after the initial interaction. Additionally, the cooperative level of low contributors increased along with their cooperative belief. The theoretical and practical implications of changes of behaviour and belief in repeated social dilemmas were identified. 相似文献
227.
Mother and father socially desirable responding in nine countries: Two kinds of agreement and relations to parenting self‐reports
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Marc H. Bornstein Diane L. Putnick Jennifer E. Lansford Concetta Pastorelli Ann T. Skinner Emma Sorbring Sombat Tapanya Liliana Maria Uribe Tirado Arnaldo Zelli Liane Peña Alampay Suha M. Al‐Hassan Dario Bacchini Anna Silvia Bombi Lei Chang Kirby Deater‐Deckard Laura Di Giunta Kenneth A. Dodge Patrick S. Malone Paul Oburu 《International journal of psychology》2015,50(3):174-185
We assessed 2 forms of agreement between mothers' and fathers' socially desirable responding in China, Colombia, Italy, Jordan, Kenya, the Philippines, Sweden, Thailand and the United States (N = 1110 families). Mothers and fathers in all 9 countries reported socially desirable responding in the upper half of the distribution, and countries varied minimally (but China was higher than the cross‐country grand mean and Sweden lower). Mothers and fathers did not differ in reported levels of socially desirable responding, and mothers' and fathers' socially desirable responding were largely uncorrelated. With one exception, mothers' and fathers' socially desirable responding were similarly correlated with self‐perceptions of parenting, and correlations varied somewhat across countries. These findings are set in a discussion of socially desirable responding, cultural psychology and family systems. 相似文献
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229.
与年龄及认知功能相关的成人脑波功率涨落图特点 总被引:8,自引:1,他引:8
对120名20-79岁正常受试者完成了与年龄及认知功能相关的脑涨落图特点的研究。结果表明:(1)脑波优势涨落功率空间构型额低枕高梯度的随龄减小过程,在认知测验差组较好组明显;(2)脑波优势涨落功率受年龄与认知因素的交互影响集中于左前右后脑轴上;(3)脑波优势涨落功率前后梯度和左右不对称性变化表明,脑波活动的前后和左右调控可能在不同层次上发挥作用,并且,前后脑和左右脑的协调活动与认知功能有密切关系。上述结果说明,脑波功率涨落与认知功能及其老化过程有密切关系。 相似文献
230.
中国传统文化的主体是儒家文化,文化与健康心理之间存在着相互作用、相互建构的关系。儒家文化与中国人的健康心理的交互建构作用主要表现在三个方面:一是心理问题躯体化,即文化心理与躯体症状的交互建构;二是心理问题道德化,即文化心理与德行标准的交互建构;三是心理问题生活化,即健康心理与伦理规范的交互建构。它们既是中国人健康心理与行为的典型表现特征,也是儒家文化与中国人的健康心理和行为交互建构的结果。心理健康、道德健康、伦理健康三者之间是一个相互作用、相互建构、协调发展的完整体系。中国心理健康服务要充分发挥心理健康理论的建构特性和行动特征,促进心理健康服务理论与实践协调发展。 相似文献