Shrinkage estimation of linear combinations of true scores

This paper is concerned with combining observed scores from sections of tests. It is demonstrated that in the presence of population information a linear combination of true scores can be estimated more efficiently than by the same linear combination of the observed scores. Three criteria for optimality are discussed, but they yield the same solution which can be described and motivated as a multivariate shrinkage estimator.Input from Eric Bradlow, Charles Lewis, and Linda Zeger is acknowledged. Research for this paper was funded by the Program Research Council (ETS). Suggestions of the Editor and of anonymous referees were instrumental in several improvements of the paper.     

A stochastic model for test-retest correlations

A simple stochastic model is formulated in order to determine the optimal time between the first test and the second test when the test-retest method of assessing reliability is used. A forgetting process and a change in true score process are postulated. The optimal time between tests is derived by maximizing the probability that the respondent has not remembered the response on the first test and has not had a change in true score. The resulting test-retest correlation is then found to be a linear function of the true reliability of the test, where the slope of this function is the key probability of not remembering and having no change in true score. Some numerical examples and suggestions for using the results in empirical studies are given. Specific recommendations are presented for improved design and analysis of intentions data.This research was made possible by a grant from the Center for Food Policy Research, Graduate School of Business, Columbia University, New York, New York, 10027.     

东西方文化下的真实自我研究：一种关系的视角

真实自我反映了个体行为与其价值观、信仰、需求等内在状态的一致性程度, 分为特质真实与状态真实。在辨析了真实自我与自我认知、自我概念清晰性、自我一致性、正直、真诚等相关概念的异同, 并梳理该领域已有理论后, 提出真实自我表现或实现的文化差异, 即西方文化中的真实自我是自主动机驱动的, 而东方文化中的真实自我是关系要求驱动的。未来可以将“关系化”作为现象场, 以儒家传统思想为理智资源, 从理论建构、社会现象(新兴网络社交平台、社会变迁), 以及结合具体的研究方法(如跨文化比较、突显情境变化的方法)等方面开展研究。     

Why Me? Why Not Me?

The decision to undergo BRCA testing is very complex and emotionally laden. This decision can be further complicated by the loss of a mother at an early age. The following personal account by a genetic counselor discusses the testing process and the struggle to accept the results and reframe one’s self-identity. The sensitive nature of this testing and the implications for other family members is explored.     

现代西方善恶评价理论述评

善恶评价的性质和善恶评价的真理性问题是伦理学研究的难点问题。现代西方伦理学界对此问题也多有探讨。对现代西方善恶评价理论的主要观点的介绍,有助于我们深化善恶评价问题的研究。     

Self-perceived Authenticity is Contaminated by the Valence of One’s Behavior

Two studies tested whether people are biased to infer that their positive actions are more authentic than their negative actions. In Study 1, participants identified a positive or negative personal characteristic and assessed the authenticity of past behavior that reflected that characteristic. In Study 2, people imagined themselves performing positive and negative behaviors that they authentically did or did not want to perform. Both studies showed that people’s judgments of the authenticity of their behavior were contaminated by their perceptions of the valence of their behavior even when the objective authenticity of the behavior was controlled. Future research must disentangle authenticity and positivity to determine the degree to which each contributes to positive outcomes that have been attributed to authenticity.     

When ignorance excuses

An ingenious argument – we may call it the Argument from Excuse – purports to show that the Standard View of Ignorance is false and the New View of Ignorance is true. On the former, ignorance is lack of knowledge; on the latter, ignorance is lack of true belief. I defend the Standard View by arguing that the Argument from Excuse is unsound. I also argue that an implication of my case is that Factual Ignorance Thesis (FIT) is false. According to FIT, whenever an agent A acts from factual ignorance, A is morally blameworthy (culpable) for the act only if A is morally blameworthy (culpable) for the ignorance from which A acts.     

关联性记忆错觉神经机制的研究

该文介绍了近年来使用DRM范式对关联性记忆错觉神经机制的研究。脑损伤病人以及正常人的神经成像研究表明：对关键诱饵的虚假再认可能和对学过项目的正确再认有着相似而又不完全相同的脑机制;颞叶中部和额叶对关联性记忆错觉的产生十分重要,并且它们各自的作用似乎都不是单一的。     

聋童与正常儿童对多种信念的认知

选取了122名3～12岁聋童,并分别用65名3～5岁的正常儿童作对照,开展了2个实验系列,探讨了儿童的正确信念、一级错误信念及二级错误信念认知的发展特点.结果如下: (1)聋童及正常儿童信念认知的发展过程中,无论是关于正确信念,还是关于一级错误信念,都是先发展自我信念认知,再发展他人信念认知;(2)关于正确信念、一级错误信念和二级错误信念认知的发展,聋童都比正常儿童滞后,但两者的发展趋势一致; (3)手语聋童在信念认知上略好于口语聋童; (4)父母为聋人或父母会手语的聋童,以及兄弟姐妹会手语的聋童,其信念认知水平要比其他聋童好.