不同注意提示线索条件下汉字数字加工的SNARC效应

采用Ponser的实验范式.以判断"壹"到"玖"的汉字数字奇偶为任务,探讨不同提示线索时在注意条件与非注意条件下的空间数字反应编码联合效应(SNARC效应).实验结果发现: (1)当有效提示线索为80%时,注意条件下汉字数字出现了SNARC效应,而非注意条件下对汉字数字的加工没有出现SNARC效应; (2)当有效提示线索为50%时,在注意和非注意条件下汉字数字都出现了明显的SNARC效应.结果表明注意水平对SNARC效应产生了影响.     

如何看待腹腔镜阑尾切除术

随着微创技术的发展,腹腔镜阑尾切除术（1aparoscopic appendectomy,LA）正逐渐被广大医务工作者所接受,但现在仍然有很多人认为LA与传统开腹阑尾切除术（open appendectomy,OA）相比没有优势,而且LA价格昂贵,不适合推广。但是作为正在发展完善的新技术,很多证据表明LA与OA相比优势正在逐步增强。     

An effect size index for comparing two independent alpha coefficients

Since Cronbach proposed the α coefficient in 1951, researchers have contributed to the derivation of its sampling distribution and the testing of related statistical hypotheses. Yet, there has been no research on effect size index relevant to coefficient α to our knowledge. Considering the importance of effect size in understanding quantitative research findings, we therefore developed an effect size index Δ for the comparison of two independent αs with equal test length based on the asymptotic distribution of under the assumptions of normality and compound symmetry. Simulations indicated that the index was applicable when the sample size was at least 100. The robustness of the derived index when the required assumptions were violated was also explored. It is suggested that the index should be applicable in most cases of unequal test lengths and could be extended to non‐normally distributed component scores. Moreover, a small simulation was conducted to explore the behaviour of Δ with correlated errors, a frequently studied situation violating the assumption of compound symmetry. The proposed index was found to be robust unless a large number of highly correlated errors were present in the data.     

Individual attitudes and perceived social norms: Reports on HIV/AIDS‐related stigma among service providers in China

This study examined HIV/AIDS‐related stigma among Chinese service providers by comparing their personal attitudes toward people living with HIV/AIDS with their perception of social norms related to people living with HIV/AIDS. We randomly selected three provincial hospitals, four city/prefecture hospitals, 10 county hospitals, 18 township health clinics, and 54 village clinics from Yunnan, China. Doctors and nurses were randomly sampled proportionally to the doctor–nurse ratio of each hospital or clinic. Lab technicians were over‐sampled in order to include an adequate representation in the analysis. A total of 1,101 service providers participated in a voluntary, anonymous survey where demographic characteristics, individual attitude and perceived social norms toward people living with HIV/AIDS, discrimination intent at work, general prejudicial attitude and knowledge on HIV/AIDS were measured. A majority of the sample demonstrated a similarity between their personal views and what they thought most people in society believe. Multiple logistic regressions revealed that participants who were younger or reported personal contact with people living with HIV/AIDS were significantly more likely to report personal attitudes toward the population that were more liberal than their perceived social norms. Holding a more liberal personal attitude toward people living with HIV/AIDS than perceived social norms was significantly and negatively related to the level of discrimination intent at work, perceived discrimination at interpersonal level and the level of general prejudicial attitude toward people living with HIV/AIDS. Results underscored the importance of understanding social norms and personal attitudes in studying HIV‐related stigma and called for the incorporation of existing human capital into future HIV stigma reduction programs.     

Imaging intelligence with proton magnetic resonance spectroscopy

Proton magnetic resonance spectroscopy (¹H-MRS) is a technique for the assay of brain neurochemistry in vivo. N-acetylaspartate (NAA), the most prominent metabolite visible within the ¹H-MRS spectrum, is found primarily within neurons. The current study was designed to further elucidate NAA–cognition relationships, particularly whether such relationships are moderated by sex, or tissue type (gray or white matter). We administered standard measures of intelligence to 63 young, healthy subjects and obtained spectroscopic imaging data within a slab of tissue superior to the lateral ventricles. We found that lower NAA within right anterior gray matter predicted better performance VIQ (F = 6.83, p = .011, r² = .10), while higher NAA within the right posterior gray matter region predicted better PIQ (F = 8.175, p = .006, r² = .12). These findings add to the small but growing body of literature linking brain biochemistry to intelligence in normal healthy subjects using ¹H-MRSI.     

Propofol induction reduces the capacity for neural information integration: Implications for the mechanism of consciousness and general anesthesia

The cognitive unbinding paradigm suggests that the synthesis of neural information is attenuated by general anesthesia. Here, we analyzed the functional organization of brain activities in the conscious and anesthetized states, based on functional segregation and integration. Electroencephalography (EEG) recordings were obtained from 14 subjects undergoing induction of general anesthesia with propofol. We quantified changes in mean information integration capacity in each band of the EEG. After induction with propofol, mean information integration capacity was reduced most prominently in the γ band of the EEG (p = .0001). Furthermore, we demonstrate that loss of consciousness is reflected by the breakdown of the spatiotemporal organization of γ waves. We conclude that induction of general anesthesia with propofol reduces the capacity for information integration in the brain. These data directly support the information integration theory of consciousness and the cognitive unbinding paradigm of general anesthesia.     

Skill transfer through goal-driven representation mapping

In this paper, we present an approach to transfer that involves analogical mapping of symbols across different domains. We relate this mechanism to Icarus, a theory of the human cognitive architecture. Our system can transfer skills across domains hypothesizing maps between representations, improving performance in novel domains. Unlike previous approaches to analogical transfer, our method uses an explanatory analysis that compares how well a new domain theory explains previous solutions under different mapping hypotheses. We present experimental evidence that the new mechanism improves transfer over Icarus’ basic learning processes. Moreover, we argue that the same features which distinguish Icarus from other architectures support representation mapping in a natural way and operate synergistically with it. These features enable our analogy system to translate a map among concepts into a map between skills, and to support transfer even if two domains are only partially analogous. We also discuss our system’s relation to other work on analogy and outline directions for future research.     

共情的认知神经研究回顾

共情是指个体对他人情绪和想法的感受及理解,它在人类个体和社会的发展中起到了重要作用。近年来,脑成像技术为研究共情的神经基础提供了有力的技术支持,发现了共情的关键功能脑区。基础与临床的实验证据表明,更好地理解共情的神经机制对于孤独症、反社会人格等精神障碍有重要的意义。该文对相关的研究进行了综述并对未来可能的研究方向提出了展望     

中国青少年心理健康素质·动力系统研究

选取44063名青少年为调查对象,采用《青少年心理健康素质调查表·动力系统分量表》考察我国青少年动力系统的发展特点。结果表明：（1）从整体上看,我国青少年的动力系统发展状况良好;（2）我国青少年的动力系统年级变化趋势表现出小学五年级得分较高,初一年级略有上升,初二年级有所下降,之后起伏波动,高三年级得分最低,但从高三年级到大学阶段迅速上升,大学阶段得分最高;（3）我国青少年在动力系统各维度上均存在显著年级差异,但在各维度上呈现出不同的年级变化趋势。     

汉语隐喻的语言形式特征及其对隐喻机器理解研究的影响

语言学界对隐喻的研究集中于从概念层面对隐喻进行认知分析,而淡化了对语言表达层面隐喻的典型特征做形式化的概括。然而,概念层面的隐喻却必须通过语言形式层面的隐喻表达来加以体现,隐喻的语言形式对隐喻的理解也具有极其重要的意义。特别是,当隐喻作为一种思维现象被纳入机器理解的研究范畴之后,隐喻的计算机制研究也开始要求高度地形式化隐喻的语言表达。鉴于此,本文面向隐喻机器理解,采用语料统计分析的方法,从大量实际隐喻语料出发,总结汉语隐喻的语言形式的复杂性特征:语言隐喻主要成分取值的不确定性、语言隐喻各成分出现与否的不确定性、隐喻嵌套和递进复用现象的普遍性,进而指出面向计算的隐喻研究困境以及出路。