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151.
基于分部评分模型的思路, 本文提出了一般化的分部评分认知诊断模型(General Partial Credit Diagnostic Model, GPCDM), 与国际上已有的基于分部评分模型思路的多级评分模型GDM (von Davier, 2008 )和PC-DINA (de la Torre, 2012 )相比, GPCDM的Q矩阵定义更加灵活, 项目参数的约束条件更少。Monte Carlo实验研究表明, GPCDM模型的参数估计精度指标RMSE介于[0.015, 0.043], 表明估计精度尚可; TIMSS (2007)实证数据应用研究表明, 与GDM和PC-DINA模型相比, GPCDM与该数据的拟合度更好, 并且使用GPCDM分析该数据的诊断效果也更优。总之, 本研究提供了一种约束条件更少、功能更为强大的多级评分认知诊断模型。 相似文献
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心理理论作为个体重要的社会认知能力之一,从1978年被提出以来一直备受关注。值此心理理论研究发展40年之际,研究试图借助文献计量学的方法,从宏观的视角呈现1999年到2018年心理理论研究的状况。结果表明,近二十年来心理理论的文献年发表量保持线性增长。文献的主题从关注心理理论的发展和测量,逐渐过渡到将心理理论放在社会认知的框架中进行探讨。研究同时以发表文献数量为指标,探讨了该领域的代表性杂志和重要作者。结合现有心理理论研究的成果,文章最后从心理理论的研究问题领域、相关脑区、毕生发展、异常发展和人工心理理论的建构几个方面进行了延伸讨论。 相似文献
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本研究以338名学前儿童为被试,采用母亲报告法探究了学前儿童睡眠时间与问题行为之间的关系,以及儿童消极情绪性的调节作用。结果发现:(1)睡眠总时长对儿童内化和外化问题行为的主效应显著,而睡眠总时长与消极情绪性对儿童内化和外化问题行为的交互作用不显著;(2)夜间睡眠比对儿童内化问题行为的主效应显著,对儿童外化问题行为的主效应不显著;夜间睡眠比与消极情绪性对儿童内化问题行为的交互作用显著,即对高消极情绪性的儿童,夜间睡眠比能够显著负向预测其内化问题行为,而对低消极情绪性的儿童,夜间睡眠比对其内化问题行为的预测并不显著;夜间睡眠比与消极情绪性对儿童外化问题行为的交互作用不显著。 相似文献
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预测编码被认为是脑与复杂环境交互的重要机制之一, 有效感知外界环境并对未来事件做出预测, 对个体生存有着至关重要的意义。人类大脑会基于感觉输入以迭代的方式持续优化表征外部环境的内部模型, 并不断预测接下来的感觉输入。以听觉模态为例, 人类及动物对声音重复和听觉变化的神经反应(如失匹配负波和刺激特异性适应)是大脑预测编码的重要体现, 表现为重复抑制和预测误差。结合人类和动物模型在此理论框架下开展跨物种研究将有助于加深我们对听觉加工, 甚至是大脑工作机制的认识。 相似文献
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Thanos Karatzias Sally Jowett Elsie Yan Robert Raeside Ruth Howard 《Psychology, health & medicine》2017,22(9):1021-1031
We set out to investigate the mediating roles of depression, resilience, smoking, and alcohol use, in the relationship between potentially traumatic life events and objective and subjective, physical and mental health in a single study. A face-to-face, population-based survey was conducted in Hong Kong (N = 1147). Information on health conditions and traumatic life events was obtained, and participants completed measures of subjective physical and mental health, depression, and resilience. Smoking and drinking were not significant mediators of the relationship between life events and both objective and subjective health. Depressive symptomatology was found to mediate the relationship between life threatening illness and subjective physical health, the relationship between abuse (physical and sexual) and subjective mental health, and the relationship between the death of a parent/partner and subjective mental health. Resilience was found to mediate the relationships between multiple traumatic life events and subjective physical and mental health. Our results indicate that psychological factors rather than biological are important mediators of the relationship between life events exposure and health. Our findings provide evidence that depressive symptomatology has a mediating role only in the case of specific potentially traumatic life events and that resilience is only a critical factor in the face of exposure to multiple traumatic events, rather than single events. Our results also indicate that behavioural factors, such as smoking and drinking, are not significant mediators of the relationship between life events and health. 相似文献
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Xin Hou Timothy A. Allen Dongtao Wei Hui Huang Kangcheng Wang Colin G. DeYoung Jiang Qiu 《Cognitive, affective & behavioral neuroscience》2017,17(5):1018-1027
Individual differences in the personality trait Agreeableness underlie humans’ ability to interpret social cues and coordinate effectively with others. However, previous investigations of the neural basis of Agreeableness have yielded largely inconsistent results. Recent evidence has demonstrated that Agreeableness can be divided into two, correlated subdimensions. Compassion reflects tendencies toward empathy, sympathy, and concern for others, while Politeness reflects tendencies toward compliance and refraining from aggression and exploitation. The present study seeks to clarify the neural substrates of Agreeableness by examining whether structural differences in the brain show distinct associations with Compassion and Politeness. Results of a meta-analysis of fMRI studies examining empathy were used to generate hypotheses about the brain regions and networks that underlie trait Compassion. Results of a large-scale structural neuroimaging investigation (N = 275) were largely consistent with the meta-analysis: Compassion was positively correlated with gray matter volume in the bilateral anterior cingulate cortex (ACC) and anterior insula (AI). Further, these differences appear to be associated with Compassion specifically, as opposed to Politeness, suggesting that these two traits have at least partially distinct neuroanatomical substrates. 相似文献
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Developing new online calibration methods for multidimensional computerized adaptive testing
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Ping Chen Chun Wang Tao Xin Hua‐Hua Chang 《The British journal of mathematical and statistical psychology》2017,70(1):81-117
Multidimensional computerized adaptive testing (MCAT) has received increasing attention over the past few years in educational measurement. Like all other formats of CAT, item replenishment is an essential part of MCAT for its item bank maintenance and management, which governs retiring overexposed or obsolete items over time and replacing them with new ones. Moreover, calibration precision of the new items will directly affect the estimation accuracy of examinees’ ability vectors. In unidimensional CAT (UCAT) and cognitive diagnostic CAT, online calibration techniques have been developed to effectively calibrate new items. However, there has been very little discussion of online calibration in MCAT in the literature. Thus, this paper proposes new online calibration methods for MCAT based upon some popular methods used in UCAT. Three representative methods, Method A, the ‘one EM cycle’ method and the ‘multiple EM cycles’ method, are generalized to MCAT. Three simulation studies were conducted to compare the three new methods by manipulating three factors (test length, item bank design, and level of correlation between coordinate dimensions). The results showed that all the new methods were able to recover the item parameters accurately, and the adaptive online calibration designs showed some improvements compared to the random design under most conditions. 相似文献