Effect of low dose ionizing radiation exposure in utero on cognitive function in adolescence

Heiervang, K. S., Mednick, S., Sundet, K. & Rund, B. R. (2010). Effect of low dose ionizing radiation exposure in utero on cognitive function in adolescence. Scandinavian Journal of Psychology, 51, 210–215. Radiation from the Chernobyl nuclear power plant meltdown greatly affected several Norwegian counties. The cognitive consequences of in utero exposure to radiation from the Chernobyl accident have been intensely debated. This study examines the cognitive outcomes for those Norwegians who were exposed as fetuses to the fallout from Chernobyl. The participants, 84 adolescents who were exposed in utero to radiation from the most contaminated areas in Norway and 94 adolescents from areas not contaminated by the radiation, were tested on verbal and nonverbal IQ. Two data analyses were conducted. First, using a control‐group design, the IQ scores of exposed and unexposed adolescents were compared. Second, in a timing‐of‐exposure design, those exposed during the most sensitive period were contrasted with those exposed later in gestation. Adolescents exposed to low‐dose ionizing radiation in utero scored significantly lower in full‐scale IQ than unexposed adolescents. The difference was restricted to verbal IQ and was not evident for nonverbal IQ. The effect was not observed in exposed adolescents who had passed the most sensitive gestational period prior to the accident and thus were exposed to the radiation from Chernobyl exclusively after gestational week 16. These participants performed as well as the controls. Although the results should be interpreted cautiously due to the study’s nonrandomized design, the data add new and important support to the hypothesis that the Chernobyl accident may have had a subtle effect on the cognitive functioning of those exposed to low‐dose ionizing radiation in utero during the most sensitive gestational period.     

小学语文教学中改善学生情绪调节困难状况的实验研究

采用实验组、控制组前后测实验设计,选取42名小学四年级学生,以语文学科教学为依托,运用教学实验方法探索语文教学中改善学生情绪调节困难状况之渗透方式的有效性。结果表明:学科渗透可以在一定程度上改善学生情绪调节困难状况、促进心理素质发展,特别是对中、高程度情绪调节困难学生的改善更为显著;实验组语文学业成绩比控制组有所提高,但并未达到显著性水平。说明学科渗透可以作为学生心理素质教育实施的有效途径之一。     

胎盘提前老化分娩时间与方式决策的浅思

胎盘提前老化(Premature aging of placenta)是指妊娠足月前胎盘提前出现退行性的结构改变,是妊娠结局不良的一个敏感预测指标。因此分娩时间及方式是胎盘提前老化临床处理的关键问题。临床上需要对其病因、产科合并症、健康效益、医疗代价、产前监测等进行辩证综合分析,进行正确判断,科学决策,从而减少不良后果发生。     

从体外受精技术获诺贝尔奖谈从事转化医学研究

转化医学是促进基础研究向临床应用的转化,同时根据临床实际提出应用基础研究课题。从2010年获诺贝尔生理学或医学奖体外受精技术的发展,探讨了转化医学研究的内容和实现转化医学研究的途径,以便更好地促进临床医学研究。     

The Fortieth Anniversary of Women's Ordination in the Lutheran Church

Abstract : This article offers a perspective on the present and future roles of women in the ELCA. It gives some analysis of women's roles in the trend of declining traditional congregations and rising megachurches while imagining the role of clergywomen in the church's next forty years as new models of ministry emerge.     

小学生的社会技能与友善—敌对型教师互动风格、社交归因的关系

以武汉市343名小学三至六年级的儿童为被试,考察儿童友善—敌对型教师互动风格与社交归因、社会技能之间的关系。结果显示:友善型、理解型教师互动风格与小学生成功内部归因、环境、自我、任务行为技能呈显著正相关,与成功外部归因呈显著负相关;理解型教师互动风格与人际行为技能呈显著正相关;不满型和训诫型教师互动风格与小学生成功和失败外部归因因呈显著正相关,与成功和失败内归因、四种行为技能呈显著负相关;成功内部归因与四种行为技能呈显著正相关;失败内部归因与人际、自我、环境行为技能呈显著正相关;成功与失败外部归因与四种行为技能呈显著负相关。社交成功的外部归因分别在不满型教师互动风格和环境、人际、自我、任务行为技能间起部分中介作用。不满型教师互动风格对成功内部归因、社会技能的预测效应显著,通过成功内部归因的中介效应不显著。     

认知老化中有意控制对自动抑制的调节作用

结合比例控制范式与基于空间位置的返回抑制范式, 探讨了认知老化过程中自上而下的有意认知控制对自动抑制的调节作用。结果表明, 当线索有效率由50%提升至80%时, 两组被试的返回抑制量均下降, 老年组表现为返回抑制消失, 但年轻组出现返回抑制的反转, 表明有意认知控制对自动抑制的调节作用受认知老化的影响而发生衰减。同时文章还就认知老化机制的新兴理论—— 执行衰退假说进行了讨论。     

心算的策略选择

从策略选择的角度来研究心算是当前心算研究的一个重要领域。有关心算活动中问题大小效应、距离效应、奇偶效应等的行为与认知神经科学研究揭示了心算活动中不同的策略选择, 进一步加深了我们对心算加工特点的了解。未来研究在注重具体问题解决的同时, 还应注重实验设计的严密性、研究的深入性与综合性相兼顾等问题。     

农村留守初中生亲社会倾向特点及其与人格、家庭功能的关系

以四川省农村地区299名留守初中生与326名非留守初中生为调查对象,采用亲社会倾向量表、家庭功能评价量表、青少年小五人格问卷,考察留守初中生亲社会倾向特点及其与人格、家庭功能间的关系,结果发现:(1)留守初中生的亲社会倾向与非留守初中生相比不存在显著差异;(2)家庭功能的问题解决,人格的开放性、谨慎性都对留守初中生的亲社会倾向具有显著的预测作用,主要表现为问题解决能力越差亲社会的行为倾向越少,个体越具有开放性、谨慎性的人格特质就越容易表现出更多的亲社会倾向;(3)人格的开放性、宜人性、谨慎性在家庭功能与亲社会倾向中起完全中介的作用。