Computerized adaptive testing: the capitalization on chance problem

This paper describes several simulation studies that examine the effects of capitalization on chance in the selection of items and the ability estimation in CAT, employing the 3-parameter logistic model. In order to generate different estimation errors for the item parameters, the calibration sample size was manipulated (N = 500, 1000 and 2000 subjects) as was the ratio of item bank size to test length (banks of 197 and 788 items, test lengths of 20 and 40 items), both in a CAT and in a random test. Results show that capitalization on chance is particularly serious in CAT, as revealed by the large positive bias found in the small sample calibration conditions. For broad ranges of theta, the overestimation of the precision (asymptotic Se) reaches levels of 40%, something that does not occur with the RMSE (theta). The problem is greater as the item bank size to test length ratio increases. Potential solutions were tested in a second study, where two exposure control methods were incorporated into the item selection algorithm. Some alternative solutions are discussed.     

How many lives can bloody and shocking road safety advertising save? The case of Spain

At the beginning of the 21st century, the punishment strategies used by the Spanish administration were considerably hardened to achieve a reduction in road accidents. This hardening could also be seen in the mass-media public advertising campaigns, with a marked shift from gentle messages to threat-based advertisements.The goal of this study is to evaluate the effectiveness of this radical change in terms of main road accident indicators and the time that the effects last using multivariate unobserved component models set up in a state space framework applied to monthly series for the 1980–2008 period. The main conclusion is that the effect on reducing road accidents is no greater when citizens are subjected to a greater level of threats in advertising campaigns than would on average be achieved using campaigns with a low level of threats. Secondly, the impact of bloody advertising in Spain is limited to the most serious accidents, those that cause deaths, either on highways or in built-up areas. Moreover, the positive effects progressively decrease as the average lifespan for significant effects of medium and high level campaigns on deaths on highways or in built-up areas was 8 months and almost 12 days. The results show that a reduction in numbers of deaths and injuries is always achieved when the level of harshness in the messages is increased after a period of several years of mild advertising.     

Different recognition cues reveal the decision rules used for egg rejection by hosts of a variably mimetic avian brood parasite

Brood parasitism imposes several fitness costs on the host species. To reduce these costs, hosts of avian brood parasites have evolved various defenses, of which egg rejection is the most prevalent. In the face of variable host-parasite mimicry and the costs of egg discrimination itself, many hosts reject only some foreign eggs. Here, we experimentally varied the recognition cues to study the underlying cognitive mechanisms used by the Chalk-browed Mockingbird (Mimus saturninus) to reject the white immaculate eggs laid by the parasitic Shiny Cowbird (Molothrus bonariensis). Immaculate eggs are the only parasite eggs rejected by this host, as it accepts all polymorphic, spotted eggs laid by cowbirds. Using a within-breeding pair experimental design, we tested for the salience of spotting, UV reflectance, and brightness in eliciting rejection. We found that the presence of spotting significantly decreased the probability of rejection while increments in brightness significantly increased rejection frequencies. The cognitive rules underlying mockingbird rejection behavior can be explained by a decision-making model which predicts changes in the levels of rejection in direct relation to the number of relevant attributes shared between host and parasite eggs.     

与任务无关的刺激-反应联结对中老年人自动加工的影响

采用掩蔽启动范式,选取字母和数字作为刺激,任务因素为与当前任务无关的处于预备状态的刺激-反应联结,探讨自上而下的任务因素对中老年人自动加工过程的影响。发现中老年被试的自动反应激活过程不受到自上而下的当前无关的、处于预备状态的刺激-反应联结作用的影响,自动加工是完全自动化的。     

On the Mind Dependence of Truth

The claim that truth is mind dependent has some initial plausibility only if truth bearers are taken to be mind dependent entities such as beliefs or statements. Even on that assumption, however, the claim is not uncontroversial. If it is spelled out as the thesis that “in a world devoid of mind nothing would be true”, then everything depends on how the phrase ‘true in world w’ is interpreted. If ‘A is true in w’ is interpreted as ‘A is true of w’ (i.e. ‘w satisfies A’s truth conditions’, the claim need not be true. If on the other hand it is interpreted as ‘A is true of w and exists in w’ then the claim is trivially true, though devoid of any antirealistic efficacy. Philosophers like Heidegger and Rorty, who hold that truth is mind dependent but reality is not, must regard such principles as “A if and only if it is true that A” as only contingently true, which may be a good reason to reject the mind dependence of truth anyway.     

神人论:俄罗斯白银时代宗教哲学的人学主题

俄罗斯宗教哲学家站在现代哲学的立场上重新诠释“神人论”这一传统基督教人学理论,在重建神、人与世界三者的内在关联的基础上,揭示了神人论的理论基础和现实意义。神人论的核心是“肯定神性”与“否定神性”的统一,人的精神实在性之确证就在于人性中内在蕴含着神性,即神人的两位一体是人存在的本质规定。只有在“绝对存在”的宗教形而上学基础上,人才可以自由的意识、反思神的原则,同时又保持与神的内在同一关联。内在精神世界中人与神的绝对同一为人的生活提供了绝对意义和永恒价值,是人所追求的本真生存方式。神人论是俄罗斯白银时代宗教哲学的人学主题和理论基础,也是宗教哲学家为完善传统形而上学所作的努力。     

CROSS-CULTURAL SIMILARITIES AND DIFFERENCES ON TWO NEO-PIAGETIAN COGNITIVE TASKS*

Two studies are reported concerning performance differences and similarities across cultures. Pascual-Leone's tests of mental attention/energy (M-power) were administered to Zulu-speaking township children aged from 7 to 12 years. In study 1, the Compound Stimulus Visual Information task (CSVI) was used to determine whether children (N = 292) performed at theoretically predicted levels previously obtained with middle-class Canadian children. In study 2, the children (N = 252) were required to complete the Figural Intersection Test (FIT) four times. Unlike the CSVI, in which learning is controlled by training prior to testing, the FIT assumes basic familiarity with the general test requirements. The purpose of repeated testing was to assess the extent of learning across trials. The results for study 1 indicate that subjects do perform at the predicted levels on the CSVI and have the same M-power as Canadian children. The results for study 2 indicate that the subjects underperform on trial 1 of the FIT but overperform on trial 2 relative to Canadian children. Deux études sont rapportées concernant des différences et des similarités inter-culturelles de performance. Les tests de l'attention mentale/énergie (‘M-power’) de Pascual-Leone ont été administrés à des enfants âgés de 7 à 12 ans provenant de communautés d'expression Zulu. Dans la première étude, la tâche d'information visuelle du stimulus composé (CSVI) a été utilisée pour déterminer si les enfants (N = 292) pouvaient performer aux niveaux prédits théoriquement qui avaient été préalablement observés chez les enfants Canadiens de classe moyenne. Dans la seconde étude, les enfants (N = 252) devaient compléter quatre fois le test de l'intersection des figures (FIT). Contrairement au CSVI, dans lequel l'apprentissage est contrôlé par l'entraînement qui précède l'administration du test, le FIT assume une familiarité de base avec les prérequis généraux du test. Le but visé par la répétition du test était d'évaluer l'étendue de l'apprentissage en fonction des essais. Les résultats de la première étude indiquent que les sujets obtiennent les performances prévues au CSVI et possèdent le měme niveau de ‘M-Power’ que les enfants Canadiens. Les résultats de la seconde étude indiquent que, par comparaison avec les enfants Canadiens, les sujets livrent une performance inférieure au premier essai du FIT, alors qu'ils obtiennent une performance supérieure au second essai.     

List structure,monotony, and levels of processing

Three experiments were designed to study the effect of the monotony of experimental lists on the level of processing of auditorily presented words. Monotonous lists were homogeneously made up of monosyllabic items and were contrasted to heterogeneous lists containing monosyllabic and bisyllabic items. The subjects' task consisted, first, in carefully listening to an experimental list made up of an equal number of words and nonwords, and second, in subjectively evaluating the actual number of words having been presented to them. Globally, it was found that subjects underestimate the number of words contained in homogeneous monosyllabic lists but not in heterogeneous ones. The first two experiments revealed that such a result held whatever the frequency of the words presented. The third experiment showed that the use of concrete words did not affect the subjective estimation of the number of words in homogeneous lists. It was concluded that words are differentially encoded as a function of the structure of the experimental list in which they are embedded. Taken together, these results suggest that the performance differences observed as a function of the list type originate in the encoding rather than retrieval processes.     

大学生网络捐助的影响因素:求助者特征的视角

以往关于捐助的心理学研究主要聚焦于现实环境中的捐助行为,以及捐助者自身特点对捐助的影响,网络环境、求助者特征对捐助影响的研究较少。本研究以大学生为被试,比较不同信息发布者情境中,网络与现实中捐助的意愿,并确定求助者的身份特征和求助信息特征对网络捐助的影响。结果发现,在捐助意愿和捐助金额方面,网络渠道高于现实渠道、熟人发布高于陌生人发布;当求助者与捐助者同为大学生时,捐助者对求助者的理性求助信息比情绪性求助信息有更强的捐助意愿和更多捐助金额。以上结果与大学生网络社会支持水平较高、处理网络信息能力较强有关。