It is well established that math anxiety has a negative relationship with math performance. A few theories have provided explanations for this relationship. One of them, the Attentional Control Theory, suggests that anxiety can negatively impact the attentional control system and increase one's attention to threat-related stimuli. Within the ACT framework, the math anxiety —working memory relationship is argued to be critical for math performance. The present meta-analyses provides insights into the mechanisms of the MA—MP relation and the mediating role (...) of WM. Through database searches with pre-determined search strings, 1,346 unique articles were identified. After excluding non-relevant studies, data from 57 studies and 150 effect sizes were used for investigating the MA—MP correlation using a random-effects model. This resulted in a mean correlation of r = −0.168. The database search of WM as a mediator for the MA—MP relation revealed 15 effects sizes leading to a descriptive rather than a generalizable statistic, with a mean indirect effect size of −0.092. Overall, the results confirm the ACT theory, WM does play a significant role in the MA—MP relationship. (shrink)

This work offers a new theory of what it means to be a legal person and suggests that it is best understood as a cluster property. The book explores the origins of legal personhood, the issues afflicting a traditional understanding of the concept, and the numerous debates surrounding the topic.

La filosofía de la historia se ha debatido durante siglos en una estéril lucha entre idealistas y materialistas. El libro de Ignacio Ellacuría es un intento de superar esa dicotomía clásica. Tomando como punto de partida algunos conceptos fundamentales de la filosofía de Zubiri, Ellacuría cree posible asumir y a la vez criticar ambos extremos, desde una actitud más realista. De ahí el título del libro. Es importante destacar que la historia, para Ignacio Ellacuría, es el lugar de realización de (...) la ética. La historia no está hecha, se construye, es un proceso de creación de posibilidades humanas, y, en tanto que tal, una labor ética. La tesis de Zubiri de que el hombre tiene que hacerse cargo de la realidad, en Ellacuría se transforma en esta otra: el ser humano está obligado a encargarse de la realidad, y a cargar con ella. Este es el imperativo ético. Imperativo que, por otra parte, no sólo le obliga individualmente al hombre, en el reducto de la propia conciencia, al modo del idealismo, ni tampoco sólo en tanto que miembro de una clase social, como en el marxismo, sino como sujeto a la vez individual y específico, como miembro a la vez solitario y solidario de la especie humana. La obra póstuma de Ignacio Ellacuría constituye sin duda su más ingente trabajo intelectual en el campo de la filosofía, y representa, por su calidad y contenido, una pieza clave para comprender no solamente su producción estrictamente filosófica, sino también su pensamiento teológico y socio-político. (shrink)

Exploring history pertinent to evolutionary developmental biology (hereafter, Evo-devo) is an exciting prospect given its current status as a cutting-edge field of research. The first and obvious question concerns where to begin searching for materials and sources. Since this new discipline adopts a moniker that intentionally juxtaposes ‘evolution’ and development’, individuals, disciplines, and institutional contexts relevant to the history of evolutionary studies and investigations of ontogeny prompt themselves. Each of these topics has received attention from historians and thus there is (...) both primary and secondary material from which to draw. For example, many historians have documented the historical trajectories of genetics and embryology, their split, and various relations (or lack thereof), especially in the first three decades of the 20th century. (shrink)

A set of visual search experiments tested the proposal that focused attention is needed to detect change. Displays were arrays of rectangles, with the target being the item that continually changed its orientation or contrast polarity. Five aspects of performance were examined: linearity of response, processing time, capacity, selectivity, and memory trace. Detection of change was found to be a self-terminating process requiring a time that increased linearly with the number of items in the display. Capacity for orientation was found (...) to be about 5 items, a value comparable to estimates of attentional capacity. Observers were able to filter out both static and dynamic variations in irrelevant properties. Analysis also indicated a memory for previously-attended locations. These results support the hypothesis that the process needed to detect change is much the same as the attentional process needed to detect complex static patterns. Interestingly, the features of orientation and polarity were found to be handled in somewhat different ways. Taken together, these results not only provide evidence that focused attention is needed to see change, but also show that change detection itself can provide new insights into the nature of attentional processing. (shrink)

De Sousa's comprehensive two-part review of a diversity of contemporary approaches to the study of consciousness is highly welcome. He makes us aware of a proliferation of theoretical and empirical approaches targeting a common theme, but diverging in many ways. He skilfully accomplishes a classification of kinds of approach, identification of the main representatives, their contributions, and respective limitations. However, he does not show how the desired integration could be accomplished. Besides summarising De Sousa's efficient analytical work, I make critical (...) comments and briefly report my contribution for the integration project. (shrink)

An entertaining history of the idea of nothing - including absences, omissions, and shadows - from the Ancient Greeks through the 20th century How can nothing cause something? The absence of something might seem to indicate a null or a void, an emptiness as ineffectual as a shadow. In fact, 'nothing' is one of the most powerful ideas the human mind has ever conceived. This short and entertaining book by Roy Sorensen is a lively tour of the history and philosophy (...) of nothing, explaining how various thinkers throughout history have conceived and grappled with the mysterious power of absence -- and how these ideas about shadows, gaps, and holes have in turned played a very positive role in the development of some of humankind's most important ideas. Filled with Sorensen's characteristically entertaining mix of anecdotes, puzzles, curiosities, and philosophical speculation, the book is ordered chronologically, starting with the Taoists, the Buddhists, and the ancient Greeks, moving forward to the middle ages and the early modern period, then up to the existentialists and present day philosophy. The result is a diverting tour through the history of human thought as seen from a novel and unusual perspective. (shrink)

In this short paper I propose that the sensorimotor approach to perception is a tree yielding two distinct theoretical fruits. One fruit is sensorimotor reductionism. The other is sensorimotor integrationism. In this paper I try to explain what makes these fruits different.

We would like to thank Dolega and Dewhurst for a thought-provoking and informed deconstruction of our article, which we take as applause from valued members of our audience. In brief, we fully concur with the theatre-free formulation offered by Dolega and Dewhurst and take the opportunity to explain why we used the Cartesian theatre metaphor. We do this by drawing an analogy between consciousness and evolution. This analogy is used to emphasize the circular causality inherent in the free energy principle. (...) We conclude with a comment on the special forms of active inference that may be associated with selfawareness and how they may be especially informed by dream states. (shrink)

Description from a book review by J. G. Beebe-Center: "Mr. Allen's book develops in detail the view that pleasure and unpleasure are essentially manifestations of the progression and thwarting of impulses. Part one is a brief summary of the principal theories of feeling. Part two is devoted to "sensory" or "bodily" pleasure and unpleasure. These forms of feeling, it is argued, 'depend on an analogue of conation existing in the organism, a nisus to maintain, or to carry out to the (...) full extent, the functioning proper to the bodily system.' Part three -- the piece de resistance (about half the book) -- deals with the relation of pleasure and unpleasure to the main instincts. Parts four, five and six take up a number of classical problems: the relation of pleasure and unpleasure to sensation, their relation to desire, the relativity of feelings, the qualitative variety of feelings, and the psychology of values. The author shows throughout a rare combination of historicophilosophical sophistication and of first-hand familiarity with the modern experimental literature.". (shrink)

Argues against several influential a priori arguments for individualism in the philosophy of mind that were influential in the 1980s.

Book Information A Theory of Justice: Revised Edition. By John Rawls. Oxford University Press. Oxford. 1999. Pp. xxii + 538. Hardback, £25.00. Paperback, £12.99.