Empirical indistinguishability: From the knowledge structure to the skills

Recent literature has pointed out that the basic local independence model (BLIM) when applied to some specific instances of knowledge structures presents identifiability issues. Furthermore, it has been shown that for such instances the model presents a stronger form of unidentifiability named empirical indistinguishability, which leads to the fact that the existence of certain knowledge states in such structures cannot be empirically tested. In this article the notion of indistinguishability is extended to skill maps and, more generally, to the competence-based knowledge space theory. Theoretical results are provided showing that skill maps can be empirically indistinguishable from one another. The most relevant consequence of this is that for some skills there is no empirical evidence to establish their existence. This result is strictly related to the type of probabilistic model investigated, which is essentially the BLIM. Alternative models may exist or can be developed in knowledge space theory for which this indistinguishability problem disappears.     

THE WHOLE BRAIN AS THE BASIS OR THE ANALOGICAL EXPRESSION OF GOD

Abstract. As human beings we inevitably try to explain our experience. In philosophical language, we deal with transcendent assertions and aspirations. The issue, then, is: how can we talk about what matters, given the structures inherent in language and basic to the way we are made? Instead of the philosophical category of Being, I advance a case for giving the human brain privileged status as an analogical expression of God, the symbol-concept of what matters most, and then suggest the illumination which can come with using that analogical expression, especially as that analogy connects us with the environment at the limbic level and constructs our world at the cerebral level.     

Four bootstrap confidence intervals for the binomial-error model

Confidence intervals for the mean function of the true proportion score ( _x ), where andx respectively denote the true proportion and observed test scores, can be approximated by the Efron, Bayesian, and parametric empirical Bayes (PEB) bootstrap procedures. The similarity of results yielded by all the bootstrap methods suggests the following: the unidentifiability problem of the prior distributiong() can be bypassed with respect to the construction of confidence intervals for the mean function, and a beta distribution forg() is a reasonable assumption for the test scores in compliance with a negative hypergeometric distribution. The PEB bootstrap, which reflects the construction of Morris intervals, is introduced for computing predictive confidence bands for x. It is noted that the effect of test reliability on the precision of interval estimates varies with the two types of confidence statements concerned.The Authors are indebted to the Editor and anonymous reviewers for constructive suggestions and comments. The authors wish to thank Min-Te Chao and Cheng-Der Fuh for some useful suggestions at earlier stages of writing this paper.     

The simplicity of theories: Its degree and form

Almost all commentators acknowledge that among the grounds on which scientists perform theory-choices are criteria of simplicity. In general, simplicity is regarded either as only a logico-empirical quality of a theory, diagnostic of the theory's future predictive success, or as a purely aesthetic or otherwise extra-empirical property of it. This paper attempts to demonstrate that the simplicity-criteria applied in scientific practice include both a logicoempirical and a quasi-aesthetic criterion: to conflate these in an account of scientists' theory-choice is to court confusion.     

认知闭合需要研究梳理与未来走向

认知闭合需要反应了个体在不确定情景中的认知动机, 在信息爆炸不断加重认知负荷的今天具有重要研究意义。研究梳理了认知闭合需要的概念结构与测量工具, 总结了近30年来相关研究在人格特质、信息加工、决策偏好、态度信念和精神健康等领域的研究结果, 最终指出区分“能力”和“动机”是未来研究的正确走向。此外, 未来的研究还应深入探讨认知闭合需要的概念与结构, 正确使用和合理开发相关测量工具, 并且丰富对其前因变量的实证研究。     

Jungian theory of dreaming and contemporary dream research – findings from the research project ‘Structural Dream Analysis’

The research method ‘Structural Dream Analysis’ (SDA) is described which allows for systematic and objective analysis of the meaning of dreams produced by patients in Jungian psychotherapies. The method focuses especially on the relationship between the dream ego and other figures in the dream and the extent of activity of the dream ego. Five major dream patterns were identified which accounted for the majority of the dreams. The clients’ dream series were dominated by one or two repetitive patterns which were closely connected to the psychological problems of the dreamers. Additionally, typical changes in the dream series’ patterns could be identified which corresponded with therapeutic change. These findings support Jung's theory of dreams as providing a holistic image of the dreamer’s psyche, including unconscious aspects. The implications for different psychoanalytic theories of dreaming and dream interpretation are discussed as well as implications for the continuity hypothesis.     

质疑星座决定人格特质的实证研究

星象学的基本假设是一个人出生时的星运位置可以决定其人格特质和重大际遇。本研究以16PF为工具,测查了165名大一学生,并按被试的出生日期和时辰确定了其星座。总的来说,结果不支持星座决定人格倾向的理论。     

Are cultural differences overrated? Examining the influence of national culture on international buyer‐seller relationships

The notion that differences in national culture influence international buyer‐seller relationships (and, indeed, all aspects of international management) is not only held as true but also axiomatic. This study questions the degree to which cultural differences impact upon buyer‐seller relations for seven key dimensions using Hofstede's indices of culture. Via two stages of data collection using two methodological approaches (seven interviews and 322 useable responses from a mail survey), the impact of culture on international buyer‐seller relationships was examined. The study's findings identified little evidence to support the popular idea that culture exerts a significant influence on international business relationships. Instead, the findings suggest that some managers perceived factors such as communication/language barriers, political barriers, geographic distance, economic factors, industry barriers, time differences, technology barriers, legal differences and infrastructure barriers as being more likely to have a greater impact on cross‐national relationships. Copyright © 2003 Henry Stewart Publications.     

The effects of presentation time on preference for curvature of real objects and meaningless novel patterns

Objects with curved contours are generally preferred to sharp‐angled ones. In this study, we aim to determine whether different presentation times influence this preference. We used images of real objects (experiment 1) and meaningless novel patterns (experiment 2). Participants had to select one of two images from a contour pair, curved and sharp‐angled versions of the same object/pattern. With real objects, the preference for curved versions was greatest when presented for 84 ms, and it faded when participants were given unlimited viewing time. Curved meaningless patterns were preferred when presented for 84 and 150 ms. However, in contrast to real objects, preference for meaningless patterns increased significantly in the unlimited viewing time condition. Participants discriminated poorly between the two versions (curved and sharp‐angled) of the meaningless patterns in the 84‐ and 150‐ms presentations (experiment 3). Therefore, in short times with meaningless patterns, participants selected mostly the curved version without being aware of the difference. In conclusion, presentation time, type of stimulus, and their interaction influence preference for curvature.     

Investigating stereotype structure with empirical network models

In this work we present empirical network models as a new approach in the investigation of stereotype structure. We will argue that empirical network models can provide more insight into stereotype structure because they do not suffer from the inherent constraints of factor analysis and multidimensional scaling (e.g., group features interpreted homogeneously only on the basis of their shared variance, impossibility to adequately represent cognitive schemas, difficulties to make inferences on the basis of dimensions potentially overlapping). In the present research we show how empirical network models can represent stereotypes as dynamic cognitive structures clustered in different substructures. These structures will be based on both the stereotype content and the co-occurrence of features in each group target. Additionally, this research shows how using empirical networks can contribute to broadening the interpretation of stereotypes representing them in the framework of prejudice or intergroup attitudes.