反应选项对时序知觉重复启动效应的影响

先前研究采用两项反应任务发现了时序知觉重复启动效应, 这可能是反应选项导致的虚假效应, 本研究采用三项反应任务对此进行了检验。实验1运用三项判断任务以消除缺乏中间选项所致的反应偏向, 结果发现重复启动显著影响“哪个图形先出现”和“两个图形同时出现”的时序判断; 实验2在实验1的基础上对“同时出现”反应选项进行两种指导语操作, 实验结果不仅与实验1一致, 而且“有把握时判断为同时出现”和“有无把握都判断为同时出现”之间没有显著差异, 说明被试能够识别时序加以判断, 不支持反应偏向的前提条件。因此, 时序知觉重复启动效应不是反应选项产生的反应偏向引发的虚假效应, 重复启动对“系列性”和“同时性”时序知觉都存在显著影响。     

比较应用题的问题表征策略研究

采用2×2×4三因素混合实验设计,对不同年级学生解比较应用题过程中的各种指标进行分析,结果表明:学生解比较应用题时的问题表征策略存在显著的年级差异;数学成绩优生、差生存在不同的问题表征策略;题目呈现方式对学生的问题表征策略有显著影响。     

If and Then: A Critique of Speculative NanoEthics

Most known technology serves to ingeniously adapt the world to the physical and mental limitations of human beings. Humankind has acquired awesome power with its rather limited means. Nanotechnological capabilities further this power. On some accounts, however, nanotechnological research will contribute to a rather different kind of technological development, namely one that changes human beings so as to remove or reduce their physical and mental limitations. The prospect of this technological development has inspired a fair amount of ethical debate. Here, proponents and opponents of such visions of human enhancement are criticized alike for engaging in speculative ethics. This critique exposes a general pattern that extends to other nano-, bio-, or neuroethical debates. While it does not apply to all discussions of “enhancement technologies” it does apply to all ethical discourse that constructs and validates an incredible future which it only then proceeds to endorse or critique. This discourse violates conditions of intelligibility, squanders the scarce and valuable resource of ethical concern, and misleads by casting remote possibilities or philosophical thought-experiments as foresight about likely technical developments. In effect, it deflects consideration from the transformative technologies of the present.

THE SCIENTIST AS STATESMAN: BIOLOGISTS AND THIRD WORLD HEALTH

One of the most threatening problems the world faces is the growing poverty crisis and the related human rights inequalities and the spread of diseases in underprivileged areas. Human rights and relief organizations try hard to contain the devastation of these interconnected difficulties. What is the role of the biomedical scientist in this endeavor? The challenges that biomedical scientists face in their research lead us to question whether scientists can go beyond the time‐consuming realm of experimental investigation and engage the issues of society in a more public way. I suggest how the scientist's role can be expanded in our complex and precarious world, introducing the idea of the modern biomedical researcher as scientist, scholar‐philosopher, and statesman for the scientific community and the larger human rights community. I provide examples of where the scientist can interface with human rights organizations, medical doctors, political and civic leaders, and the science‐religion dialogue. My argument reveals the emerging role of the biomedical scientist as one of public service in addition to and beyond the realm of the experimental investigator. This role, however, is formidable, and I list some of the obstacles it entails.     

竹溪县降低孕产妇死亡率和消除新生儿破伤风项目分析

为实施"降低孕产妇死亡率和消除新生儿破伤风项目",通过培训乡村产儿科技术服务人员,以改善乡镇卫生院产儿科服务条件,提高育龄妇女住院分娩安全意识,降低孕产妇死亡率和消除新生儿破伤风.开展了人员培训、健康教育、设备配置、贫困救助、监督指导等活动.孕产妇死亡率、新生儿破伤风等重点指标达到终期目标.提出贫困地区妇幼卫生事业建设与发展必需有可行性项目支持.     

Examining Nonnormal Latent Variable Distributions for Non-Ignorable Missing Data

Missing not at random (MNAR) modeling for non-ignorable missing responses usually assumes that the latent variable distribution is a bivariate normal distribution. Such an assumption is rarely verified and often employed as a standard in practice. Recent studies for “complete” item responses (i.e., no missing data) have shown that ignoring the nonnormal distribution of a unidimensional latent variable, especially skewed or bimodal, can yield biased estimates and misleading conclusion. However, dealing with the bivariate nonnormal latent variable distribution with present MNAR data has not been looked into. This article proposes to extend unidimensional empirical histogram and Davidian curve methods to simultaneously deal with nonnormal latent variable distribution and MNAR data. A simulation study is carried out to demonstrate the consequence of ignoring bivariate nonnormal distribution on parameter estimates, followed by an empirical analysis of “don’t know” item responses. The results presented in this article show that examining the assumption of bivariate nonnormal latent variable distribution should be considered as a routine for MNAR data to minimize the impact of nonnormality on parameter estimates.     

Attentional Predictors of 5‐month‐olds' Performance on a Looking A‐not‐B Task

In the first year of life, the ability to search for hidden objects is an indicator of object permanence and, when multiple locations are involved, executive function (i.e. inhibition, cognitive flexibility and working memory). The current study was designed to examine attentional predictors of search in 5‐month‐old infants (as measured by the looking A‐not‐B task), and whether levels of maternal education moderated the effect of the predictors. Specifically, in a separate task, the infants were shown a unique puppet, and we measured the percentage of time attending to the puppet, as well as the length of the longest look (i.e., peak fixation) directed towards the puppet. Across the entire sample (N = 390), the percentage of time attending to the puppet was positively related to performance on the visual A‐not‐B task. However, for infants whose mothers had not completed college, having a shorter peak looking time (after controlling for percentage of time) was also a predictor of visual A‐not‐B performance. The role of attention, peak fixation and maternal education in visual search is discussed. Copyright © 2015 John Wiley & Sons, Ltd.     

Citizen Science,the Body of Christ,and Testimonial Epistemology

How does explicit theological knowledge emerge out of communal practices, who is involved in its production, and what are its procedures? These are neither neutral nor arbitrary methodological questions; they are themselves deeply theological. Digital innovations and the subsequent transformations of society and academia invite us to redefine the work of theology. Epistemologically drawing on a theology of the cross and centring the communal nature and vulnerable existence of the witnessing community, we develop a model of doing theology that is collaborative and exploratory within the medial transformations of the digital age. Taking cues from participatory research conceptions of “citizen science,” we propose going toward and beyond a “citizen theology.” We need the courage to conceive of a theology that is ultimately centreless. Therefore, we cannot aspire to testimonially responsible forms of doing theology without striving for epistemic justice and diaconal empowerment at a global level. The “distributed theology” we envision promotes global (catholic), decentral (apostolic), and communal (local) forms of knowledge production by the whole of the body of Christ in ever more distributed ways.     

How to answer an unanswerable question? Factors affecting correct “don't know” responding in memory tasks

When reporting from memory, people may often be asked unanswerable questions—questions for which the correct answer has never been encoded. These unanswerable questions should be met with an “I don't know” response. Previous research has shown that a manipulation commonly used to enhance memory at retrieval—context reinstatement—reduces appropriate “do not know” responding to unanswerable questions. Here we investigated whether this reduction is due to increased belief that a given question is answerable, or solely to increased confidence in specific responses for questions already believed to be answerable. In two experiments, we show that context reinstatement reduces “do not know” responding even when a “do not remember” option is available to express beliefs that particular questions are answerable. These results indicate that improved access to contextual information at retrieval creates an erroneous belief that unanswerable questions are in fact answerable.