Cognitive Brain Event-Related Potentials and Emotion Processing in Maltreated Children

Cognitive event-related potentials (ERPs) were recorded from 23 maltreated and 21 nonmaltreated children. Children were presented with slides of Ekman photographs of asingle model posing an angry (25%), a happy (25%), or a neutral (50%) facial expression. In 1 of 2 counterbalanced target conditions, children were asked to press a button in response to the angry face; in the other target condition, they responded to the happy face. Both samples, as expected, exhibited the largest amplitude of the P300 component of the ERP to target stimuli and the smallest amplitude to nontargets. For nonmaltreated children, the average amplitude of P300 across slides was comparable for the 2 target conditions. In contrast, maltreated children displaed larger P300 ampltude to stimuli when they were directed to attend to angry, as opposd children displayed larger p300 amplitude to stimuli whe they were directed to attend to angry, as opposed to happy, targets. These reaults suggest different cognitive processing for positive versus negative affective expressions by children with histories of atypical emotiaonal exotional experiences.     

The Collective that Didn't Quite Collect: Reflections on the IALS

The concept and methodology of IALS obviously represent progress for literacy research. Nevertheless, this survey presents serious limitations. It prioritises the handling of data-based information as opposed to experiential and contextualized information, ranking at a higher position those who handle the first kind of information. The survey ignores how people solve problems in their life context. The competence of people cannot be understood merely through outside observation and a questionnaire situation. In the case of Poland, the interpretation of data manifests an ethnocentric Western attitude, tending to reduce cultural differences to a cultural deficit. Two IALS-inspired surveys conducted in Spain and Portugal mixed quantitative and qualitative methods in order to take into account the social relations in their cultural context. This article questions the role of research, which cannot be limited to the objectivation of reality, but should help to transform and improve it. The alternative model proposed is named "investigation action."     

Who Benefits From a Foundational Logic Course? Effects on Undergraduate Course Performance

Being able to understand and evaluate arguments in different modalities and in different disciplines is thought to be a key component of students’ academic success in college. However, many students do not receive explicit instruction in the basic concepts and rules of argumentation. Using a difference-in-differences approach with a multicohort longitudinal data set of almost 15,000 undergraduates beginning in health and science, technology, engineering, and mathematics (STEM)-related fields at a research university, we examined changes in relative performance of students after enrolling in an introductory logic course. We find that students improved their grade point average (GPA) after taking the course, especially if they begin college with low academic achievement (Cohen’s d?=?0.18). Our results are consistent with the idea that acquiring foundational skills, in particular general skills in argumentation, prepares STEM students for future learning.     

信息伦理学的本体论基础

文章首先对信息伦理学的悠久历史作了简单回顾。信息伦理学起源于米歇尔·佛科特(Michel FoucauIt)所分析的希腊语概念“自由演说”或言论自由。关于信息伦理学的最新概念尤其与20世纪随着计算机技术和因特网的发展而出现的各种问题密切相关,它包括大众媒体、图书馆学、信息科学以及商业等领域的伦理问题。从广义上说,信息伦理学概念涉及所有可能现象的数字重建,从而导致与数字本体论相关的种种问题。作者根据海德格尔关于本体论与形而上学关系的观点,认为本体论与“存在”本身有关,它不仅仅与形而上学讨论的主题即生物的生存有关。本文将海德格尔的理论和乔治·斯宾赛·布朗(George Spencer Brown)、高特路·甫瑞(Gottlob Frege)、尼克拉斯·鲁曼(Niklas Luhmann)等学者的学说相提并论,同时加以比较。用佛科特的专业术语来说,本体论是形而上学的尴尬困境。从本体论的角度探讨信息伦理学的基础,其首要目的是质疑数字本体论的形而上学的奢望。数字本体论被认为是当今对“存在”的普遍理解。作者把人类存在作为一种与万物存在即“无标记空间”相关的伦理关系加以分析,在此基础上探讨一些数字技术的挑战,并着重分析数字代理人的道德状况。作者据理论证,信息伦理学不仅仅涉及与佛劳瑞德(Floridi)所提到的“信息领域”相关的伦理问题。文章将这种观点与佛劳瑞德提出的关于信息伦理学基础以及数码代理人道德状态的论点进行对比分析。文章认为,简化论者把人体作为数字数据的观点忽视了数字本体论的局限性,抛弃了伦理定位的基础。最后,文章探讨了同“数字分隔”相关的问题以及信息伦理学跨文化的方方面面,并提出了长期和短期的研究设想。     

Contributing factors to long‐term citation count in marine and freshwater biology articles

Researchers have investigated factors thought to affect the total number of citations in various academic disciplines, and some general trends have emerged. However, there are still limited data for many fields, including aquatic sciences. Using papers published in 2003–2005 (n = 785), we investigated marine and freshwater biology articles to identify factors that may contribute to the probability of citation and for cumulative citation counts over 10 years. We found no relationships with probability of citation; however, we found evidence that for those that were cited at least once, cumulative citations were related to several factors. Articles cited by books received more citations than those never cited by books, which we hypothesized to be indicative of the impact an article may have in the field. We also found that articles first cited within 2 years of publication received more cumulative citations than those first cited after 2 years. We found no evidence that self‐citation (as the first citation) had a significant effect on total citations. Our findings were compared with previous studies in other disciplines, and it was found that aquatic science citation patterns are comparable to fields in science and technology but less so to humanities and social sciences.     

The effect of an instructional intervention on middle school english learners' science and english reading achievement

This study examined the effect of a quasi‐experimental project on fifth grade English learners' achievement in state‐mandated standards‐based science and English reading assessment. A total of 166 treatment students and 80 comparison students from four randomized intermediate schools participated in the current project. The intervention consisted of on‐going professional development and specific instructional science lessons with inquiry‐based learning, direct and explicit vocabulary instruction, integration of reading and writing, and enrichment components including integration of technology, take‐home science activities, and university scientists mentoring. Results suggested a significant and positive intervention effect in favor of the treatment students as reflected in higher performance in district‐wide curriculum‐based tests of science and reading and standardized tests of oral reading fluency. © 2012 Wiley Periodicals, Inc. J Res Sci Teach 49: 987–1011, 2012     

La función autorreguladora del habla privada infantil: Un análisis crítico de las recientes discusiones de la teoría de Vygotski

Resumen

Recientes hallazgos empíricos han puesto en duda la teoría de Vygotski acerca de la función autorreguladora del habla privada infantil. En primer lugar, la mayoría de los estudios en este campo señalan la aparición de habla privada sólo en la mitad de los niños de sus muestras. Además, esos niños que efectivamente hablan emiten pocas verbalizaciones, de modo que la posible relevancia del habla privada en los procesos de solución de problemas queda seriamente cuestionada. Por otra parte, un gran número de estudios han tratado sin éxito de evidenciar una relación funcional entre el habla privada producida por los niños y el logro en las tareas cognitivas. El presente estudio se basa en la hipótesis de que la escasez de habla privada es un artefacto del paradigma de investigación usado habitualmente en los estudios recientes. También argumentamos que, desde la perspectiva vygotskiana, ésta tiende a aparecer asociada al fracaso en las tareas cognitivas porque tanto el habla privada como la probabilidad de fracaso se incrementan ante tareas difíciles. Un total de 32 preescolares fueron filmados en vídeo mientras realizaban tareas semánticas y perceptivas y sus verbalizaciones fueron transcritas y codificadas en categorías de habla social y privada. Los resultados indican que la condición más frecuentemente usada en los estudios recientes de hecho minimiza la producción de habla privada por parte de los niños y que los fracasos en las tareas se asocian con niveles más elevados de habla autorreguladora. A medida que el número de verbalizaciones autorreguladoras declina, aumentan los susurros y el habla musitada, apoyando la idea de Vygotski de que el habla privada no desaparece con la edad, sino que se va interiorizando hasta constituir el habla interior.     

Talking About Ourselves, Talking About Our Mothers: Latina Prospective Teachers Narrate Their Life Experiences

Through a Bakhtinian conceptual framework, this text explores Latina prospective teachers’ life histories—their experiences at home, in their K-12 schooling, on campus in a Midwestern university, and in their teacher education program. Further, it shows how often, when asked about their own experiences, Latinas responded with stories of their mothers’ past and present experiences. The author shows how drawing on stories of their mothers supported young women in rebutting discourses promulgated by white female peers regarding their cultural and language backgrounds, making them feel dismissed and unvalued. They used “mother stories” as ways to assert their strengths, knowledge, and understandings about schools and schooling.     

Fluid balance of elite Brazilian youth soccer players during consecutive days of training

In this study we investigated pre-training hydration status, fluid intake, and sweat loss in 20 elite male Brazilian adolescent soccer players (mean?±?s: age 17.2?±?0.5 years; height 1.76?±?0.05?m; body mass 69.9?±?6.0?kg) on three consecutive days of typical training during the qualifying phase of the national soccer league. Urine specific gravity (USG) and body mass changes were evaluated before and after training sessions to estimate hydration status. Players began the days of training mildly hypohydrated (USG?>?1.020) and fluid intake did not match fluid losses. It was warmer on Day 1 (33.1?±?2.4°C and43.4?±?3.2% relative humidity; P?相似文献