Sensory processing disorder in a primate model: evidence from a longitudinal study of prenatal alcohol and prenatal stress effects

Disrupted sensory processing, characterized by over- or underresponsiveness to environmental stimuli, has been reported in children with a variety of developmental disabilities. This study examined the effects of prenatal stress and moderate-level prenatal alcohol exposure on tactile sensitivity and its relationship to striatal dopamine system function in thirty-eight 5- to 7-year-old rhesus monkeys. The monkeys were from four experimental conditions: (a) prenatal alcohol exposed, (b) prenatal stress, (c) prenatal alcohol exposed + prenatal stress, and (d) sucrose controls. Increased D(2) receptor binding in the striatum, evaluated using positron emission tomography neuroimaging, was related to increased withdrawal (aversion) responses to repetitive tactile stimuli and reduced habituation across trials. Moreover, prenatal stress significantly increased overall withdrawal responses to repetitive tactile stimulation compared to no prenatal stress.     

Child development and evolutionary psychology

Evolutionary developmental psychology involves the expression of evolved, epigenetic programs, as described by the developmental systems approach, over the course of ontogeny. There have been different selection pressures on organisms at different times in ontogeny, and some characteristics of infants and children were selected in evolution to serve an adaptive function at that time in their life history rather than to prepare individuals for later adulthood. Examples of such adaptive functions of immaturity are provided from infancy, play, and cognitive development. Most evolved psychological mechanisms are proposed to be domain specific in nature and have been identified for various aspects of children's cognitive and social development, most notably for the acquisition of language and for theory of mind. Differences in the quality and quantity of parental investment affect children's development and influence their subsequent reproductive and childcare strategies. Some sex differences observed in childhood, particularly as expressed during play, are seen as antecedents and preparations for adult sex differences. Because evolved mechanisms were adaptive to ancestral environments, they are not always adaptive for contemporary people, and this mismatch of evolved mechanisms with modern environments is seen in children's maladjustment to some aspects of formal schooling. We argue that an evolutionary perspective can be valuable for developing a better understanding of human ontogeny in contemporary society and that a developmental perspective is important for a better understanding of evolutionary psychology.     

Children's over- and underestimation of academic competence: a longitudinal study of gender differences, depression, and anxiety

A total of 807 third and sixth graders completed questionnaires about their academic competence, feelings of depression, and symptoms of anxiety, every 6 months for 3 years. Teachers provided objective measures of academic competence. Compared to teachers' ratings, boys overestimated and girls underestimated their academic competence. Gender differences first emerged in fourth or fifth grade and increased through eighth grade. Symptoms of depression and anxiety were negatively associated with academic overestimation. Furthermore, controlling for depression and anxiety eliminated most of the gender differences in academic over- and underestimation. Finally, self-reported depression and anxiety predicted changes in the tendency to overestimate academic competence over time. Evidence of the reverse relation was much weaker.     

经济发展的瓶颈刻不容缓的中国老龄化问题

本文综述了中国老龄化的成因，困境，强调了由于中国人口结构变化将导致中国未来的人口老化衰退，经济衰退。优选合理、高效的战略对策对保持经济发展，社会稳定有决定作用。     

研究型大学本科生教育的问题及对策

首先指出了在研究型大学本科生教育过程中,存在着教学科研功能失衡和本科生教育与研究生教育层次定位不当两个问题;其次分析了在本科生教育过程中,教学与科研之间存在着良性互动关系,本科生教育与研究生教育之间也存在着同生共进的关系;最后提出了研究型大学本科生教育的建设对策。     

A survey of pediatricians' attitudes and experiences with court in cases of child maltreatment

OBJECTIVES: To explore pediatricians' attitudes and experiences with the court system in child maltreatment cases. DESIGN: An anonymous, cross-sectional survey of a random sample of pediatricians registered with the North Carolina Medical Board. RESULTS: The response rate of the study was 60% (N=270). Few pediatricians (10%) reported that they had "ever" suspected maltreatment but decided not to report it. Pediatricians were equally likely to recall positive and negative experiences in court for child abuse cases. Pediatricians with negative court experiences were more likely to view reporting as time-consuming and were more than twice as likely not to report suspected cases of maltreatment (OR 2.4, 95% CI 1.04, 6.0). Seventy-five percent of pediatricians felt that court is harmful or distressing for children. CONCLUSIONS: The majority of pediatricians report suspected cases of child maltreatment. Pediatrician's court experiences play a role in the response to child maltreatment cases, influencing attitudes towards the legal system and the process of caring for maltreated children. Future research efforts should address physicians' concerns about the impact of court on children, ways to improve the working relationship between the legal system and physicians, and the training needs of physicians in child maltreatment, including testifying and understanding the court process.     

Climate changes may lead to the collapse of ancient civilizations

Studies of an international research consortium indicate that severe monsoon changes might have simultaneously accelerated the fall of two great ancient civilizations, the Tang Dynasty (618-907 AD), one of the most prosperous reigns in Chinese history, and the Maya civilization in Meso-America that ended in 830 AD.     

数据挖掘在企业管理中的应用

文章提出了利用数据挖掘中的模糊聚类技术,分析企业运转过程中发生的各成本要素以及其相互关系而产生的分类,对于企业的决策者来说具有重大的现实意义。