Individual distributions under ordinal measurement

For ordinal measurement the concept of an individual propensity distribution is developed. For any given individual the mean of this distribution is his true score, for which estimation procedures are discussed. Two measures of individual dispersion are considered and their distributions derived in the null case. These measures are shown to be counterparts at the individual level of Kendall's tau and Spearman's rho. Estimation of the two dispersion measures from sample data is investigated, and the relation of these estimates to the variance of the individual propensity distribution is derived.     

Ordinal data: An alternative distribution

To date, virtually all techniques appropriate for ordinal data are based on the uniform probability distribution over the permutations. In this paper we introduce and examine an alternative probability model for the distribution of ordinal data. Preliminary to deriving the expectations of Spearman's rho and Kendall's tau under this model, we show how to compute certain conditional expectations of rho and tau under the uniform distribution. The alternative probability model is then applied to ordinal test theory, and the calculation of true scores and test reliability are discussed.     

选择性颞叶梗塞对鼠学习记忆能力影响的定量研究

应用光化学的方法选择性诱导颞叶梗塞,同时测定学习记忆能力、神经功能缺失及梗塞面积。结果表明：颞叶梗塞鼠的学习记忆能力显著受损,但无明显感觉运动障碍;颞叶梗塞鼠的学习记忆受损程度与梗塞面积大小有关。结果提示选择性颞叶梗塞是一种理想的痴呆动物模型。     

Définir ou détecter des pathologies ? Utilisation et interprétation des scores seuils à la lumière du débat dimensions/catégories

A number of psychometric tests are aimed at locating the performance of an individual along a continuous range that goes from normal to worrying. In a different paradigm, there are tests whose goal is to assess whether or not an individual is healthy with respect to a psychological, psychiatric or neurological pathology that is defined independently from the test itself. The former rely on a dimensional concept of psychopathologies; the latter imply a categorical concept. The former require to compare the performance of the individual to a standard sample that is representative of the general population; the latter involve a standard sample representative of the healthy population only. The former might imply the use of a cut-off score to indicate that a certain degree of rarity of the performance has been reached, while the latter must involve a cut-off score to make a decision (whether the individual belongs to the “healthy” or “pathological” category), a score that is most often set so as to control the false-positive rate in making this decision. In the former paradigm, the cut-off score defines or contributes to define the pathology. In the latter, it only helps detecting it. This article aims at making clear the difference between these two realms and highlight their practical as well as theoretical impact on psychological practice.     

数学焦虑对初中生数学应用题成绩的影响

通过对筛选出的391名初中1～3年级学生进行《数学应用题问卷》、《数学焦虑问卷》测试,探讨了数学焦虑对初中数优生、数困生数学应用题成绩的影响。结果发现：1）应用题成绩性别差异不显著,性别不是影响应用题成绩的主要因素;2）数优生的焦虑程度远远低于数困生;3）数学焦虑的年级差异不显著;4）数学焦虑的性别差异不显著;5）数学焦虑对应用题成绩具有一定的预测作用。     

脑梗死不同病因亚型同血浆同型半胱氨酸浓度的关系研究

为探讨脑梗死患者血浆同型半胱氨酸（HCY）水平同病因分型及疾病严重程度的关系,选择首发脑梗死急性期患者73例,对照组30例,进行TOAST病因分型、NIHSS神经功能缺损评分、血浆HCY检测。结果显示,病例组血浆HCY升高率、水平比对照组显著增高;大动脉粥样硬化亚型病例组血浆HCY水平比对照组明显增高;病例组血浆HCY水平同NIHSS评分呈正相关,提示高HCY血症是脑梗死发病及大动脉粥样硬化亚型脑梗死发病的高危因素,血浆HCY水平同神经功能缺损程度正相关。     

用信息函数法对标准参照测验作质量分析

根据项目反应理论的信息函数法,以自主开发的“现代教育和心理测量通用分析系统”为工具,对两个大规模实施的标准参照测验进行了测验质量分析。结果说明,信息函数分析法比经典真分数理论分析法,可以获得更丰富、深刻、有针对性的资料,能对项目筛选修订、测验编制开发给出有力的指导,值得大力引进、推广。     

个人拟合指数对人格测验的影响及意义

个人拟合指标是考察心理测验中偏差得分模式的新方法。研究中考察了G、C、MCI、U3、U、W、ECI6、L等8个拟合指标对艾森克人格问卷信效度的影响,以及各指标与正反向题回答不一致项目数的相关。结果表明,删除不同比例拟合程度不好的个体后,测验的信效度明显提高。同时PFS可鉴别人格测验中的默认反应偏差。各指标中l对测验信效度的改善效果最为理想。     

The Spanish validation of the Short Health Anxiety Inventory: Psychometric properties and clinical utility

Background/ObjectiveThe Short Health Anxiety Inventory (SHAI) is a widely used self-report instrument to evaluate health anxiety. To assess the SHAI's factor structure, psychometric properties, and accuracy in differentiating Spanish non-clinical individuals from patients with severe health anxiety or hypochondriasis.MethodA total of 342 community participants (61.6% women; M_age = 34.60, SD = 14.91) and 31 hypochondriacal patients (51.6% women; M_age = 32.74, SD = 9.69) completed the SHAI and other self-reports assessing symptoms of hypochondriasis, depression, anxiety sensitivity, worry, and obsessive-compulsive.ResultsThe original two-factor structure was selected as the best structure, based on its parsimony and empirical support (Factor 1: Illness likelihood; Factor 2: Negative consequences of illness). Moreover, the Spanish version of the SHAI demonstrated good construct and concurrent and discriminant validity, and internal consistency. A cutoff of 40.5 (total score) accurately distinguished non-clinical individuals from patients with severe health anxiety or hypochondriasis.ConclusionsThe SHAI is an adequate screening instrument to measure health anxiety in Spanish-speaking community adults.