结构方程模型常用拟合指数检验的实质

拟合指数检验是评价结构方程模型(SEM)的重要环节。从协方差结构分析的角度将SEM与传统的回归模型比较,容易理解为什么SEM需要拟合指数。揭示了目前几种流行的拟合指数检验的实质:基于卡方的绝对拟合指数(如RMSEA)检验的实质是重新设定卡方检验的显著性水平(不同于通常的.05),相对拟合指数(如NNFI和CFI)检验的实质是基于虚模型设定均方(卡方与自由度之比)降低到的比例;在NNFI大于临界值后,报告和检验CFI是不必要的。根据研究结果提出了一些方便实用的拟合检验建议。     

The role of corpus size and syntax in deriving lexico-semantic representations for a wide range of concepts

One of the most significant recent advances in the study of semantic processing is the advent of models based on text and other corpora. In this study, we address what impact both the quantitative and qualitative properties of corpora have on mental representations derived from them. More precisely, we evaluate models with different linguistic and mental constraints on their ability to predict semantic relatedness between items from a vast range of domains and categories. We find that a model based on syntactic dependency relations captures significantly less of the variability for all kinds of words, regardless of the semantic relation between them or their abstractness. The largest difference was found for concrete nouns, which are commonly used to assess semantic processing. For both models we find that limited amounts of data suffice in order to obtain reliable predictions. Together, these findings suggest new constraints for the construction of mental models from corpora, both in terms of the corpus size and in terms of the linguistic properties that contribute to mental representations.     

Actor,partner, and similarity effects of personality on global and experienced well-being

The current study examined actor, partner, and similarity effects of personality on a variety of well-being indices, including both global and experiential measures of well-being, in 2578 heterosexual couples (N = 5156 individuals; M_age = 51.04, SD = 13.68) who completed the 2016 Wellbeing and Daily Life supplement to the Panel Study of Income Dynamics (PSID). Among actor effects, those for conscientiousness, agreeableness, extraversion, and neuroticism were the most robust predictors of well-being. Among partner effects, conscientiousness and neuroticism were the most robust predictors of well-being. Consistent with past research, similarity effects on well-being were generally small and not always significant. The results are discussed in the context of experiential conceptualizations of well-being and operationalizing similarity in relationship research.     

Étude exploratoire de la stabilité à long terme des indices standard du WISC-IV

By a Test–Retest procedure, this study explores the long-term stability of the French WISC-IV index scores. The average Test–Retest interval was 2.33 years. The sample consisted of 96 non-clinical children aged between 8 and 12 years. Mean difference between the two testings was not statistically significant for VCI, PRI, WMI, GAI and FSIQ. Test–Retest reliability correlations between the two assessments are high for VCI, GAI and FSIQ (ranging from .81 to .82). An analysis of the performance differences between two assessments indicates intra-individual stability for WMI and GAI. In sum, only GAI demonstrates reliable long-term stability at an inter-and intra-individual level.     

Determining transformation distance in similarity: Considerations for assessing representational changes a priori

The representational distortion (RD) approach to similarity (e.g., Hahn, Chater, & Richardson, 2003 Hahn, U., Chater, N. and Richardson, L. B. 2003. Similarity as transformation. Cognition, 87: 1–32.  [Google Scholar]) proposes that similarity is computed using the transformation distance between two entities. We argue that researchers who adopt this approach need to be concerned with how representational transformations can be determined a priori. We discuss several roadblocks to using this approach. Specifically we demonstrate the difficulties inherent in determining what transformations are psychologically salient and the importance of considering the directionality of transformations.     

Empathy towards individuals of the same and different ethnicity when depicted in negative and positive contexts

Individuals can show different empathy responses towards others depending on in-group and out-group biases. The present research tested empathy biases related to ethnicity when targets were depicted in negative and positive contexts. Caucasian (n = 99) and Asian (n = 99) participants gave subjective ratings for images depicting same or other ethnicity individuals in socially-relevant negative and positive contexts. Participants rated significantly higher on all three dimensions of empathy (affect, perspective taking, and understanding) for same ethnicity targets than for other ethnicity targets. However, this bias was found only for targets depicted in negative contexts. Moreover, no ethnicity bias was found for ratings of valence, arousal, distress, and interest. The results suggest that ethnicity-related biases in empathy are present, are limited to negative contexts, and are not merely a manifestation of a more general cognitive or affective bias.     

Examining the Role of Similarity Coefficients and the Value of Behavioural Themes in Attempts to Link Serial Arson Offences

When relying on crime scene behaviours to link serial crimes, linking accuracy may be influenced by the measure used to assess across‐crime similarity and the types of behaviours included in the analysis. To examine these issues, the present study compared the level of linking accuracy achieved by using the simple matching index (S) to that of the commonly used Jaccard's coefficient (J) across themes of arson behaviour. The data consisted of 42 crime scene behaviours, separated into three behavioural themes, which were exhibited by 37 offenders across 114 solved arsons. The results of logistic regression and receiver operating characteristic analysis indicate that, with the exception of one theme where S was more effective than J at discriminating between linked and unlinked crimes, no significant differences emerged between the two similarity measures. In addition, our results suggest that thematically unrelated behaviours can be used to link crimes with the same degree of accuracy as thematically related behaviours, potentially calling into the question the importance of theme‐based approaches to behavioural linkage analysis. Copyright © 2012 John Wiley & Sons, Ltd.     

2型糖尿病医疗后果评价指标体系的系统论

用系统论的观点分析2型糖尿病医疗后果评价指标体系的整体观、动态相关性和最优化原则,提出2型糖尿病医疗后果评价指标体系的概念框架,为全面、系统评价2型糖尿病的医疗后果和提出优化医疗方案提供科学依据.     

Body mass index,inflammatory biomarkers and neurocognitive impairment in HIV-infected persons

To determine the relationships among body mass index (BMI), and HIV-associated neurocognitive impairment and the potential mediating effects of inflammatory cytokines. Among the HIV-infected individuals (N = 90) included in this study, obesity was associated with slower processing speed (β = ?.229, standard error (SE) = 2.15, p = .033), compared to participants with a normal BMI, after controlling for psychosocial and HIV clinical factors. Serum concentrations of the interleukin-16 (IL-16) cytokine were significantly associated with slowed processing speed (β = ?.235, SE = 1.62, p = .033) but did not mediate the relationship between obesity and processing speed These findings suggest that obesity may contribute to cognitive processing speed deficits in HIV-infected adults. Elevated concentrations of IL-16 are also associated with slowing, though the results suggest that obesity and IL-16 may exert independent effects.     

Does decision making transfer across similar and dissimilar sports?

ObjectivesThe ability to make decisions under time pressure is crucial to performance in sport. However, there remains a paucity of research that examines whether the skills underpinning decision-making transfer across similar or dissimilar sports. We examine whether decision making transfers from soccer to other sports that may be deemed to be either similar (basketball) or dissimilar (tennis) based on sports taxonomy.MethodsSkilled soccer players (N = 20) completed a video-based temporal occlusion test designed to measure decision-making involving offensive sequences of play from soccer, basketball, and tennis. Participants were required to decide on an appropriate action to execute for each situation presented.ResultsResponse accuracy was higher in the soccer decision-making task compared to the basketball and tennis tasks. Furthermore, accuracy scores were higher on the basketball compared to the tennis task.ConclusionsThere appears to be some positive transfer of decision-making between sports that share similar elements, supporting the importance both of specificity and generality in expert performance.