自上而下注意控制的脑成像研究进展

自上而下的注意控制是调节人类各种认知活动的一种重要执行功能,本文从三个方面总结了该领域内脑成像研究的新进展：(1)自上而下注意控制的脑机制;(2)不同种类的注意控制脑机制的一致性;(3)自上而下的注意控制对其它皮层中神经活动的影响。     

The effects of sport dance on brain connectivity and body intelligence

Dancing is characterised by physical movement in accordance with rhythm perception. Twelve sport dancers and 12 age- and sex-matched young adults who had no dance experience (control group) were recruited. Body intelligence and brain activity were assessed in both groups using the Body Intelligence Scale (BIS) and resting state functional magnetic resonance imaging. BIS scores of dancers were higher than those of control subjects. The dancer group showed increased functional connectivity from the precentral gyrus to the right cingulate gyrus, right occipital fusiform gyrus, right inferior frontal gyrus, right medial frontal gyrus, left inferior frontal gyrus, right parietal postcentral gyrus, and right frontal lobe compared with control subjects. Sport dancers had increased body intelligence sensitivity compared with matched controls. In addition, the characteristics of dance, including physical movement in accordance with rhythm perception, might be associated with increased brain activity in the somatosensory and rhythm perception networks.     

从EDRF的发现来看科学研究中的偶然性和必然性

本文通过讲述血管内皮舒张因子(endothelium-derived relaxing factor,EDRF)发现过程中的一些事例,讨论科学研究中的偶然性与必然性之间的辩证关系。把握偶然性和必然性之间的对立统一关系,有助于深化对自然和社会规律的认识。科研工作者应运用辩证唯物主义的观点,重视偶然现象,探索必然规律。     

复发转移性乳腺癌患者血浆VEGF水平的临床价值研究

探讨血浆血管内皮生长因子（P-VEGF）在乳腺癌术后复发转移患者中的表达情况及临床意义。采用酶联免疫吸附试验检测50例术后复发转移性乳腺癌患者及20例乳腺良性疾病对照组的P-VEGF含量,同期采用微粒子化学发光法检测术后复发转移性乳腺癌患者血清CEA和CA15-3的表达情况,进行对比研究。结论认为转移肿瘤细胞可产生大量...     

大学生学校适应性简明问卷的编制与验证

该研究旨在探讨当前大学生学校适应性的结构维度并编制简明评定问卷,运用了探索性因素分析和验证性因素分析的方法。结果表明,我国大学生学校适应性的结构维度包括四个方面的内容,分别是学习能力适应、人际关系适应、学校政治适应、学校文化适应。研究结果还显示,大学生学校适应性评定问卷具有良好的信度和效度指标,问卷的α系数达到0.80,探索性因素分析中总方差解释量达到62.89%,验证性因素分析的各项指标均达到理想水平。     

Continuous and discrete latent structure models for item response data

Relations are examined between latent trait and latent class models for item response data. Conditions are given for the two-latent class and two-parameter normal ogive models to agree, and relations between their item parameters are presented. Generalizationss are then made to continuous models with more than one latent trait and discrete models with more than two latent classes, and methods are presented for relating latent class models to factor models for dichotomized variables. Results are illustrated using data from the Law School Admission Test, previously analyzed by several authors.     

Beyond principal component analysis: A trilinear decomposition model and least squares estimation

The paper derives sufficient conditions for the consistency and asymptotic normality of the least squares estimator of a trilinear decomposition model for multiway data analysis.     

阅读保持的类比结构映射效应研究

探讨文章阅读过程中类比结构映射效应与共同元素效应对阅读信息保持的迁移作用,包括两个实验,实验Ｉ探讨前阅读的源文章与目标文章在结构上与命题上的共同性对目标文章信息保持的迁移效果,结果表明,前后阅读文献的结构共同目标文章的保持有显著的促进作用,命题共同的促进作用不显著,实验２进一步探讨在源文章与目标文章结构或命题有共同性的情况下,提示与否对目标文章的信息保持效果的影响作用,结果证明,有两种情况下,提示