Nonparametric item response theory axioms and properties under nonlinearity and their exemplification with knowledge space theory

This paper investigates the dichotomous Mokken nonparametric item response theory (IRT) axioms and properties under incomparabilities among latent trait values and items. Generalized equivalents of the unidimensional nonparametric IRT axioms and properties are formulated for nonlinear (quasi-ordered) person and indicator spaces. It is shown that monotone likelihood ratio (MLR) for the total score variable and nonlinear latent trait implies stochastic ordering (SO) of the total score variable, but may fail to imply SO of the nonlinear latent trait. The reason for this and conditions under which the implication holds are specified, based on a new, simpler proof of the fact that in the unidimensional case MLR implies SO. The approach is applied in knowledge space theory (KST), a combinatorial test theory. This leads to a (tentative) Mokken-type nonparametric axiomatization in the currently parametric theory of knowledge spaces. The nonparametric axiomatization is compared with the assumptions of the parametric basic local independence model which is fundamental in KST. It is concluded that this paper may provide a first step toward a basis for a possible fusion of the two split directions of psychological test theories IRT and KST.     

Mental architectures with selectively influenced but stochastically interdependent components

The way external factors influence distribution functions for the overall time required to perform a mental task (such as responding to a stimulus, or solving a problem) may be informative as to the underlying mental architecture, the hypothetical network of interconnected processes some of which are selectively influenced by some of the external factors. Under the assumption that all processes contributing to the overall performance time are stochastically independent, several basic results have been previously established. These results relate patterns of response time distribution functions produced by manipulating external factors to such questions as whether the hypothetical constituent processes in the mental architecture enter AND gates or OR gates, and whether pairs of processes are sequential or concurrent. The present study shows that all these results are also valid for stochastically interdependent component times, provided the selective dependence of these components upon external factors is understood within the framework of a recently proposed theory of selective influence. According to this theory each component is representable as a function of three arguments: the factor set selectively influencing it, a component-specific source of randomness, and a source of randomness shared by all the components.     

The Indirect Effect of Teachers’ Creative Mindsets on Teaching Creativity

Understanding how teachers’ implicit beliefs promote and inhibit students’ creativity has important implications for fostering creativity in the classroom. This study investigated whether the effect of teachers’ fixed creative mindset on their self‐efficacy for teaching creativity was mediated by their perceptions of students’ potential and the degree to which this indirect effect varied by level of growth creative mindset. A sample of educators (N = 119) completed an online survey containing questions regarding creative mindsets, perceptions of students’ potential, self‐efficacy for teaching creativity, and a set of relevant covariates. A moderated mediation analysis indicated that the more teachers believed creativity to be innate, the less teachers tended to perceive every student to possess creative potential. Consequently, teachers’ confidence in their ability to teach for creativity was diminished. Results from the corresponding tests of simple indirect effects indicated that this negative indirect effect of a fixed creative mindset was lessened by teachers’ growth creative mindset. Taken together, the findings suggest the likely significant role of teachers’ fixed and growth creative mindsets for fostering creativity in classroom.     

目标预知对路径整合的影响

本研究采用头盔式虚拟现实与返回起点或路标的路径完成任务, 通过指导语来调控被试对于返回位置的预知, 检验目标预知对人类路径整合的影响。实验结果表明, 对于返回起点这一目标的预知可以使被试有效地忽略由于路标出现或路标数量增加而导致的干扰, 而对于返回路标这一目标的预知程度越高, 可以促使被试做出更准确的反应。这样的结果体现了目标预知作为一种非感知觉因素对于人类路径整合的影响, 也体现了人类路径整合的策略性和灵活性。     

高中生学习力的影响因素研究*

采用自编学习力及学习力影响因素问卷,对3056名高中生进行调查,建构学习力与影响因素的数学模型,探究各影响因素对高中生学习力的影响路径。结果发现,（1）影响高中生学习力的因素有六个,分别是认知能力、动机水平、精神状态、人际协调、身心优势感和学习氛围。（2）对学习力解释的贡献率大小排列依次为：精神状态、动机水平、学习氛围、认知能力、身心优势感和人际协调。（3）学习方法运用力主要受动机水平、精神状态、学习氛围、认知能力等4因素的影响;学习态度调控力主要受到精神状态、动机水平、学习氛围及认知能力等4因素的影响;学习自控力主要受精神状态的影响;提问互惠力主要受认知能力、精神状态、动机水平及学习氛围的影响。     

基于一般线性模型框架的心理统计教学

心理统计学教学中,不同的统计方法常常是独立教学,致使学生不易理解各种方法之间的关系。事实上,t检验、方差分析和多元线性回归等方法都可以统一到一般线性模型的框架下,而结构方程是对这个框架的最一般化的描述,且结构方程路径图是呈现这个框架的形象工具。因此,本文尝试用路径图的方式来呈现心理学研究中最常用的统计方法,并将结构方程分析结果与传统分析结果进行对照,帮助学生建立一般线性模型上位概念,将以往孤立的统计方法联系起来。     

映射具体性和语境线索对新颖隐喻加工的影响

研究旨在考察映射具体性对新颖隐喻加工的影响及语境线索的作用,并进一步探索映射具体性高的隐喻加工困难的原因。实验1的ERPs结果发现：知觉隐喻反应时显著长于物理-心理隐喻和直接语义;两类隐喻在有语境线索下的反应时显著长于无语境线索。有语境线索的知觉隐喻比无语境线索在前部位置诱发了更负的N400成分,在中部诱发了更正的LPC成分;有语境线索的物理-心理隐喻在前部、顶部比无语境线索诱发了更正LPC成分。实验2的语义判断任务结果发现：在映射具体性不同的两类隐喻中,多映射通路隐喻的反应时均显著长于单一映射通路隐喻。总体结果支持语境线索对新颖隐喻加工的干扰效应。     

Vacancy-mediated structural changes in Au–Cu nanoparticles

We report the formation of new phases in bimetallic Au–Cu nanoparticles. These phases were observed in nanoparticle synthesised by adopting a three-step protocol in a single pot. Nanoparticles at 180°C for 1?h led to the formation of single-phase solid solution of Cu in Au. Subsequent heat treatment at 290°C for 2?h of these Au–Cu nanoparticles revealed three new phases. One of them relates to the modification of occupancy of Cu in an ordered AuCu tetragonal phase (tP4). This cell although retains tetragonal symmetry but displays metrical properties akin to that of a cube. The other two relates to vacancy ordering along <111> directions in the {111} planes of an ordered AuCu3 cubic phase (cP4). On the one hand, statistical occupancy of vacancy on Cu site in this cell leads to the reduction of cell size from ～3.75?Å to ～3.5?Å whereas ordering of vacant layer on the other hand gives rise to symmetry breaking. Former continues to display cubic symmetry whereas latter transforms to a trigonal cell.     

The Effects of an Anti-Nuclear War Film on Attitudes toward Nuclear Issues

This study tested the effects of an anti-nuclear war film on students' attitudes toward nuclear issues. Twenty-six male and female Canadian undergraduates were shown the film “If You Love This Planet”; another 26 were shown a neutral film. Students shown the anti-nuclear war film showed more support for activism and protest against nuclear war. The study provided evidence that a film can influence activist attitudes toward nuclear issues and that such attitudes are based more on self-concern than on altruistic concern about one's country. The study also found that males tended to be more optimistic than females about the future of the human race and more willing than females to sacrifice themselves for their country.     

Early life experiences and self-compassion: a structural equation modelling / Experiencias en la vida temprana y autocompasión: un modelo de ecuaciones estructurales

Abstract

The aim of the present study is to examine the relationships between early life experiences and self-compassion. Sample of the study consists of 268 university students, in Turkey. Participants completed the Early Life Experiences Scale and the Self-compassion Scale. The relationships between early life experiences and self-compassion were examined using correlation analysis and the hypothesis model was tested through structural equation modeling. In correlation analysis, self-kindness, common humanity and mindfulness factors of self-compassion were found negatively and self-judgment, isolation and over-identification factors of self-compassion were found positively related to early life experiences. The structural model fitted well (χ² = 21.92, df = 9, χ²/df = 2.43, p = .00914, AGFI = .93, GFI = .97, CFI = .98, NFI = .97, NNFI = .95, IFI = .98, RFI = .92, SRMR = .047, RMSEA = .073). According to path analysis results, self-kindness, common humanity and mindfulness were predicted negatively by early life experiences. Further early life experiences predicted self-judgment, isolation and over-identification in a positive way. This research shows that early life experiences have a direct impact on the self-compassion.