Task Difficulty and the Time Scales of Warm-Up and Motor Learning

The authors investigated the influence of task difficulty on warm-up decrement and learning across practice sessions. Three groups of participants practiced a star-tracing task over 3 consecutive days with different levels (e.g., easy, medium, hard) of task difficulty. The performance data were modeled with a 2 time scale function that represented the transient, fast time scale process of warm-up decrement superimposed with the persistent, slow time scale process of learning. Movement time decreased as a function of practice with the most difficult condition exhibiting the greatest reduction though still the longest movement time. The 2 time scale model provided a better fit to the data than an exponential or power law function and showed that the 3 difficulty conditions exhibited similar rates of change for the respective slow (i.e., learning) and fast (i.e., warm-up decrement) time scale processes that varied by an order of magnitude. Task difficulty was inversely related to the initial level of warm-up decrement but not the rate of performance recovery early in a practice session. The findings support the postulation that there is a persistent learned component to the initial conditions in subsequent practice sessions but that there is a common time scale of accommodating the transient process of warm-up decrement.     

Dysfunctional Attitude Scale (DAS). Psychometrics and Norms of the Swedish Version

Abstract

The Swedish version of the Dysfunctional Attitude Scale (DAS) was examined for reliability, validity and other psychometric characteristics, including non-clinical norms. Parallelism between the DAS-A and DAS-B versions, reliability, test-retest stability and validity of the DAS-A as a measure of depressive cognitive content were supported in lithium-treated euthymic patients with unipolar depressive disorder and healthy controls. Other psychometric properties of the DAS-A were investigated in a randomly selected normal sample (n = 498) of the population between 20 and 70 years of age in a Swedish county. The results were similar to those of earlier normative studies of the scale. A cumulative percentage normative scale of the DAS-A scores is presented.     

论医疗鉴定制度的完善

医疗鉴定是医疗纠纷处理的核心,当医患双方认可医疗鉴定的公正性、医疗鉴定程序的透明化时,我国的医疗鉴定制度才真正趋于完善。通过医疗事故技术鉴定和医疗损害司法鉴定的对比,提出医疗鉴定机构的设置、鉴定人员的选取、确保鉴定结论的公正等一系列制度。     

The construct validity of three entry level personality inventories used in the UK: a cautionary case study

We report an error in “The Construct Validity of Three Entry Level Personality Inventories Used in the UK: A Cautionary Case Study” by Neil Anderson and Deniz S. Ones (European Journal of Personality, 2003, Vol. 17, S39–S66). We also alert the reader to a potential data shift of one data row in the dataset reported on in Anderson and Ones (2003) and provide an alternate table. Copyright © 2007 John Wiley & Sons, Ltd.     

Comment on Anderson and Ones (2008)

The ‘erratum and addendum’ by Anderson and Ones ( 2008 ) does not state unambiguously that participants' Hogan Personality Inventory (HPI) scale scores were incorrectly matched with their scores on the other inventories' scales, nor does it mention the existence of other errors in the scoring of the Occupational Personality Questionnaire (OPQ) and Business Personality Indicator (BPI) scales. We demonstrate these errors and we recommend the retraction of the articles by Anderson and Ones ( 2003 ) and Ones and Anderson ( 2002 ). Copyright © 2007 John Wiley & Sons, Ltd.     

Frege's Content-Principle and Relevant Deducibility

Given the harmony principle for logical operators, compositionality ought to ensure that harmony should obtain at the level of whole contents. That is, the role of a content qua premise ought to be balanced exactly by its role as a conclusion. Frege's contextual definition of propositional content happens to exploit this balance, and one appeals to the Cut rule to show that the definition is adequate.We show here that Frege's definition remains adequate even when one relevantizes logic by abandoning an unrestricted Cut rule. The proof exploits the fact that in the relevantized logic, which abandons the unrestricted rule of Cut, any failure of the transitivity of deduction is offset by the epistemic gain involved in learning that a stronger-than-expected result holds.     

Complete Axiomatizations for Reasoning about Knowledge and Branching Time

Sound and complete axiomatizations are provided for a number of different logics involving modalities for the knowledge of multiple agents and operators for branching time, extending previous work of Halpern, van der Meyden and Vardi [to appear, SIAM Journal on Computing] for logics of knowledge and linear time. The paper considers the system constraints of synchrony, perfect recall and unique initial states, which give rise to interaction axioms. The language is based on the temporal logic CTL*, interpreted with respect to a version of the bundle semantics.     

中学生学习成功感量表的初步研究

在访谈、开放式问卷等的基础上,自编了中学生学习成功感量表,并对上海市随机抽取的642名中学生进行了测量。结果表明：该量表的49个项目均有较好的区分度;四个分量表之间的相关表明该量表的建构是正确的;因素分析表明成功感分量表可以分为：与学习本身有关的积极情感、与他人有关的积极情感、满意感和学业自我效能感四个因子;该量表有较高的信度和效度,可以作为评鉴中学生学习成功感的有效工具。     

研究生职业价值观的定量比较研究

用修订后的中文super职业价值观量表为工具对377名在读硕士研究生的职业价值观进行调查,研究结果表明：1．在研究生职业价值观中影响最大的因素为进取心、经济价值和工作关系。2．研究生对15种职业价值尺度最重视的前4位依次为生活方式、成就、独立性、同事关系,而对监督关系、变动性、安全性、管理最不重视。研究生的职业价值观在不同年级、性别、工作经历、婚姻状况、学科间重视顺序一致性程度很高,但在一些价值尺度上也表现出了团体差异和个别差异。