Mechanisms and neural basis of object and pattern recognition: a study with chess experts

Comparing experts with novices offers unique insights into the functioning of cognition, based on the maximization of individual differences. Here we used this expertise approach to disentangle the mechanisms and neural basis behind two processes that contribute to everyday expertise: object and pattern recognition. We compared chess experts and novices performing chess-related and -unrelated (visual) search tasks. As expected, the superiority of experts was limited to the chess-specific task, as there were no differences in a control task that used the same chess stimuli but did not require chess-specific recognition. The analysis of eye movements showed that experts immediately and exclusively focused on the relevant aspects in the chess task, whereas novices also examined irrelevant aspects. With random chess positions, when pattern knowledge could not be used to guide perception, experts nevertheless maintained an advantage. Experts' superior domain-specific parafoveal vision, a consequence of their knowledge about individual domain-specific symbols, enabled improved object recognition. Functional magnetic resonance imaging corroborated this differentiation between object and pattern recognition and showed that chess-specific object recognition was accompanied by bilateral activation of the occipitotemporal junction, whereas chess-specific pattern recognition was related to bilateral activations in the middle part of the collateral sulci. Using the expertise approach together with carefully chosen controls and multiple dependent measures, we identified object and pattern recognition as two essential cognitive processes in expert visual cognition, which may also help to explain the mechanisms of everyday perception.     

Implicit Theories of Creativity in Higher Education: A Constructivist Study

A qualitative constructivist study was conducted to explore university teachers’ implicit theories of creativity. The aim of the study was to understand how university teachers (NL?=?46) define creativity and perceive its manifestations and development. University teachers’ conceptions of creativity were elicited using the Implicit Theories of Creativity Questionnaire (ITC-Q). The qualitative analysis resulted in five types of implicit theories of creativity and its development: individualistic theories, activity theories, result-oriented theories, relational theories, and growth theories. By including a new theoretical position, target group, and a methodological framework, the study broadened the dialogue about creativity and its development in higher education.     

Stereotype threat and executive resource depletion: examining the influence of emotion regulation

Research shows that stereotype threat reduces performance by diminishing executive resources, but less is known about the psychological processes responsible for these impairments. The authors tested the idea that targets of stereotype threat try to regulate their emotions and that this regulation depletes executive resources, resulting in underperformance. Across 4 experiments, they provide converging evidence that targets of stereotype threat spontaneously attempt to control their expression of anxiety and that such emotion regulation depletes executive resources needed to perform well on tests of cognitive ability. They also demonstrate that providing threatened individuals with a means to effectively cope with negative emotions--by reappraising the situation or the meaning of their anxiety--can restore executive resources and improve test performance. They discuss these results within the framework of an integrated process model of stereotype threat, in which affective and cognitive processes interact to undermine performance.     

Factors associated with traumatic symptoms and internalizing problems among adolescents who experienced a traumatic event

The aim of the present study was to identify factors that are related to the traumatic symptoms and problem behavior among adolescents who experienced the New Years fire in 2001 in Volendam, The Netherlands. Three groups of factors were considered: pre-trauma (personality and coping), trauma-related (physical and emotional proximity to disaster), and post-trauma factors (received social support). Forty-five adolescents completed the questionnaire. Two years after the disaster, these adolescents experienced significant traumatic stress reaction (70% within the clinical range) and showed clinically significant levels of internalizing problems (37%). Pre-trauma, individual factors were identified as the most important predictors of distress, followed by received social support. The indicators of physical and emotional proximity to disaster explained little variance in distress.     

Inflexibility of experts--reality or myth? Quantifying the Einstellung effect in chess masters

How does the knowledge of experts affect their behaviour in situations that require unusual methods of dealing? One possibility, loosely originating in research on creativity and skill acquisition, is that an increase in expertise can lead to inflexibility of thought due to automation of procedures. Yet another possibility, based on expertise research, is that experts' knowledge leads to flexibility of thought. We tested these two possibilities in a series of experiments using the Einstellung (set) effect paradigm. Chess players tried to solve problems that had both a familiar but non-optimal solution and a better but less familiar one. The more familiar solution induced the Einstellung (set) effect even in experts, preventing them from finding the optimal solution. The presence of the non-optimal solution reduced experts' problem solving ability was reduced to about that of players three standard deviations lower in skill level by the presence of the non-optimal solution. Inflexibility of thought induced by prior knowledge (i.e., the blocking effect of the familiar solution) was shown by experts but the more expert they were, the less prone they were to the effect. Inflexibility of experts is both reality and myth. But the greater the level of expertise, the more of a myth it becomes.     

Studying visual search using systems factorial methodology with target-distractor similarity as the factor

Systems factorial technology (SFT) is a theory-driven set of methodologies oriented toward identification of basic mechanisms, such as parallel versus serial processing, of perception and cognition. Studies employing SFT in visual search with small display sizes have repeatedly shown decisive evidence for parallel processing. The first strong evidence for serial processing was recently found in short-term memory search, using target-distractor (T-D) similarity as a key experimental variable (Townsend & Fifi?, 2004). One of the major goals of the present study was to employ T-D similarity in visual search to learn whether this mode of manipulating processing speed would affect the parallel versus serial issue in that domain. The result was a surprising and regular departure from ordinary parallel or serial processing. The most plausible account at present relies on the notion of positively interacting parallel channels.     

Postgraduate research students: People in context?

This article seeks to explore learning, development and academic success, using postgraduate research students' experiences and relating them to submission and completion rates. The perceptions and circumstances of a sample of postgraduate research students from one cohort in a large civic university were examined via questionnaire and interviews. Significant associations between data gained via questionnaire and outcome of research study are presented, together with qualitative illustrations from comments and interviews with participating individuals. A developmental, sociocultural understanding of the learner is discussed. This supports a brief review of a package of practical measures designed to assist universities to support research students, especially those who may have difficulty negotiating the experience of research study, and their supervisors, and ultimately improve retention and submission rates.     

Some Weakened Gödelian Ontological Systems

We describe a KB Gödelian ontological system, and some other weak systems, in a fully formal way using theory of types and natural deduction, and present a completeness proof in its main and specific parts. We technically and philosophically analyze and comment on the systems (mainly with respect to the relativism of values) and include a sketch of some connected aspects of Gödel's relation to Kant.     

Authority-based Argumentative Strategies: A Model for their Evaluation

In this paper, I try to develop an informal model for the analysis and evaluation of argumentative strategies based on active authorities. The explanations necessary to understand the idea of the model and what is modelled are given through the development of the paper. I first give an example of argumentative activities. After that, the main assumption of the model is given. In the third part, the relevant aspects of the argumentative activity are analysed, while the principles of the evaluation are explained in the fourth part. The informal model is presented in the fifth part. In the final remarks, the suggestions for further work are given, as well as a comparison with some related recent works in argumentation theory.     

Toleration vs. Doctrinal Evil in Our Time

Our time is characterized by what seems like an unprecedented process of intense global homogenization. This reality provides the context for exploring the nature and value of toleration. Hence, this essay is meant primarily as a contribution to international ethics rather than political philosophy. It is argued that because of the non-eliminability of differences in the world we should not even hope that there can be only one global religion or ideology. Further exploration exposes conceptual affinity between the concepts of intolerance, ideology, and doctrinal evil. The last concept is developed in contrast to pure evil and average evil, and under the assumption of the metaphysical necessity of free will. Doctrinal evil is found to represent the main source of intolerance as a result of a mechanism that tends to confuse doctrinal evil (or the competing conceptions of the good) with pure evil. This connection between doctrinal evil and pure evil provides ideologies with their forcefulness. Tolerance cannot be properly understood in terms of a simple opposition to intolerance, however. Tolerance emerges as a sort of vigilance, conscientiousness, and non-negligence based not on a supposedly correct interpretation of the good, but rather on the acceptance of the fallibility of any such attempted definition. Conversely, the principal evil in doctrinal evil is found in arrogance that accompanies the intolerance-inducing irresponsible thoughtlessness. With this conceptual topology in mind the paper also addresses questions regarding religious tolerance, the ideology of human rights and democracy, the right to self-defense, ways to face evil, the dialectics of using old names for novel evils, and related issues. This revised version was published online in August 2006 with corrections to the Cover Date.