Maximizing the coefficient of generalizability under the constraint of limited resources

A procedure for maximizing the coefficient of generalizability under the constraint of limited resources is presented. The procedure uses optimization techniques that offer an investigator or test constructor the possibility of employing practical constraints. The procedure is illustrated for the two-facet random-model crossed design.     

青少年学习倦怠量表的多元概化分析

运用多元概化理论考察青少年学习倦怠量表（ASBI）的测量学属性。结果发现,ASBI各因子以及全量表的概化系数和可靠性指数均达到较好水平,既可用于常模参照测验,也可用于标准参照测验;各因子的分量比例还不尽完善,低成就感对全域总分的贡献略低于在全量表中的分值比重,对相对误差方差贡献最大的是低成就感,学业疏离对绝对误差方差的贡献最大;今后ASBI的修订工作,可考虑对学业疏离和低成就感因子条目质量的改进,同时适当增加身心耗竭因子的条目数以提高其测量信度。     

画概念图对高中二年级学生认知结构形成的影响

运用联想测试方法探索高二学生学习新陈代谢一章后的认知结构。运用相关系数值绘制出了学生的认知结构图。结果显示,运用概念图策略进行教学的实验班学生更容易形成认知结构。实验班学生所形成的认知结构更良好、更合理。     

Coactive processing of sensory signals for in-group but not out-group stimuli

ABSTRACT

There is ample evidence showing that decision times are shorter when detecting two targets for which the same response is required, compared to when only one of the targets is present—resulting in a redundancy gain. Though effects of perceptual manipulations on redundancy gains are established, effects of social associations are still unclear. Here, we examined for the first time whether associating arbitrary stimuli with in-group as opposed to out-group targets modulates redundancy gains. Participants made associations between a shape, a colour and either in- or out-group labels. They then had to discriminate whether in- or out-group stimuli appeared (single or redundant features). Responses to in-group but not to out-group stimuli violated predictions of models in which the associated features are processed independently, and were consistent with in-group stimuli being processed with super-capacity. Our results, replicated across two experiments, providing the first evidence that there is enhanced perceptual integration for information associated with an in-group.     

Extension of Feldt's approach to testing homogeneity of coefficients of reliability

Limitations and extensions of Feldt's approach to testing the equality of Cronbach's alpha coefficients in independent and matched samples are discussed. In particular, this approach is used to test equality of intraclass correlation coefficients.This work was supported by the National Institute of Mental Health Specialized Research Center Grant # MH-30854.     

基于概化理论的作假识别量表编制及其作用

基于概化理论,探讨在《大学生心理资本量表》中加入作假识别量表的具体编制过程及其在提升量表信度、效度等方面的作用。通过因素分析验证《作假识别量表》的单维性;通过概化研究,研究其信效度,并嵌入《大学生心理资本量表》进行验证。结果表明：因素分析解释率为55.858%,概化研究结果显示G系数和Φ系数分别为0.825,0.809。因此,《作假识别量表》有很好的信效度,嵌入《大学生心理资本量表》后能有效地识别作假行为和筛选被试。     

On the analysis of studies of choice

In a review of 103 sets of data from 23 different studies of choice, Baum (1979) concluded that whereas undermatching was most commonly observed for responses, the time measure generally conformed to the matching relation. A reexamination of the evidence presented by Baum concludes that undermatching is the most commonly observed finding for both measures. Use of the coefficient of determination by both Baum (1979) and de Villiers (1977) for assessing when matching occurs is criticized on statistical grounds. An alternative to the loss-in-predictability criterion used by Baum (1979) is proposed. This alternative statistic has a simple operational meaning and is related to the usual F-ratio test. It can therefore be used as a formal test of the hypothesis that matching occurs. Baum (1979) also suggests that slope values of between .90 and 1.11 can be considered good approximations to matching. It is argued that the establishment of a fixed interval as a criterion for determining when matching occurs, is inappropriate. A confidence interval based on the data from any given experiment is suggested as a more useful method of assessment.     

Signal detection theory with item effects

Applications of signal detection theory (SDT) often involve presentations of different items on each trial, such as slides in a medical imaging study or words in a memory study. If factors particular to the items themselves, apart from being a signal or noise, affect observers’ responses, then ‘item effects’ are present. One way to model these effects is to use a latent continuous variable as an item ‘factor’, such as item ‘difficulty’. Details of SDT models with item effects are clarified via derivations of their implied conditional means, variances, and covariances. Intra-item correlations are defined and suggested as measures of the magnitude of item effects. The SDT-item models are simple random coefficient models and can be fit with standard software. More general models, such as item models with mixing and/or with random observer effects, are also considered.     

测验信度估计：从α系数到内部一致性信度

沿用经典的测验信度定义, 简介了信度与a 系数的关系以及a系数的局限。为了推荐替代a系数的信度估计方法, 深入讨论了与a 系数关系密切的同质性信度和内部一致性信度。在很一般的条件下, 证明了a 系数和同质性信度都不超过内部一致性信度, 后者不超过测验信度, 说明内部一致性信度比较接近测验信度。总结出一个测验信度分析流程, 说明什么情况下a 系数还有参考价值; 什么情况下a 系数不再适用, 应当使用内部一致性信度(文献上也常称为合成信度)。提供了计算同质性信度和内部一致性信度的计算程序, 一般的应用工作者可以直接套用。     

概化理论在绩效评估中的应用

概化理论借助其理论上的优势在很大程度上克服了基于经典测量理论绩效评估存在的缺陷。它可以对绩效评估中的信度进行更全面的估计,更好地预测和控制误差,并且概化理论的独特视角和方法还为360度绩效评估的效度求取提供了理论支持。