Our ability to select relevant information from the environment is limited by the resolution of attention – i.e., the minimum size of the region that can be selected. Neural mechanisms that underlie this limit and its development are not yet understood. Functional MRI was performed during an object tracking task in 7- and 11-year-old children, and in young adults. Object tracking activated canonical fronto-parietal attention systems and motion-sensitive area MT in children as young as 7 years. Object tracking performance improved (...) with age, together with stronger recruitment of parietal attention areas and a shift from low-level to higher-level visual areas. Increasing the required resolution of spatial attention – which was implemented by varying the distance between target and distractors in the object tracking task – led to activation increases in fronto-insular cortex, medial frontal cortex including anterior cingulate cortex (ACC) and supplementary motor area, superior colliculi, and thalamus. This core circuitry for attentional precision was recruited by all age groups, but ACC showed an age-related activation reduction. Our results suggest that age-related improvements in selective visual attention and in the resolution of attention are characterized by an increased use of more functionally specialized brain regions during the course of development. (shrink)

The present study investigated the role of thought suppression in incubation, using a delayed incubation paradigm. A total of 301 participants were tested over five conditions, viz., continuous work control, incubation with a mental rotations interpolated task, focussed suppression, unfocussed suppression and a conscious expression condition. Checks were made for intermittent work during the incubation condition. The target task was alternative uses for a brick. In the incubation and suppression conditions, participants worked for 4 minutes, then had a break during (...) which suppression or the mental rotations interpolated task was carried out for 3 minutes before conscious work was resumed for a further 4 minutes on the alternative uses task. Results indicated that both incubation with an interpolated distractor task and incubation with suppression were effective in enhancing performance relative to controls. The intermittent work hypothesis (that effects of an incubation period are simply due to illicit con.. (shrink)

_The Collected Works of John Stuart Mill_ took thirty years to complete and is acknowledged as the definitive edition of J.S. Mill and as one of the finest works editions ever completed. Mill's contributions to philosophy, economics, and history, and in the roles of scholar, politician and journalist can hardly be overstated and this edition remains the only reliable version of the full range of Mill's writings. Each volume contains extensive notes, a new introduction and an index. Many of the (...) volumes have been unavailable for some time, but the _Works_ are now again available, both as a complete set and as individual volumes. (shrink)

J.W. Olson addresses the Christian doctrine of revelation by asking how theological truth claims can possibly be rooted in God’s incarnational self-communication. Engaging with the phenomenology of Martin Heidegger, Olson offers an interpretation of the Eucharist that grounds Christian knowledge in an embodied understanding of the sacrament.

This essay considers the intricate relationship between the thought of William James and the political theory of Harold J. Laski mainly in the years 1915 to 1930. I suggest James's arguments and vocabulary have a greater presence in Laski's work than has been previously detailed. The links between James's and Laski's thought are apparent in Laski's accounts of the self and his descriptions of the nature and structure of social experience; each of these in some way derives from James's psychology, (...) empiricist metaphysics and pragmatic method. The links are demonstrated by Laski's explicit references to James's ideas in his books and letters as well as in his adoption of Jamesian terms, phrases and motifs. This essay also shows that in applying James's ideas to political life Laski brought to light the equivocal nature of James's philosophy. Equally however, reading Laski against the background of James's intellectual legacy helps us understand more clearly some of the ambiguities and tensions in Laski's work; for instance how he could move with apparent ease from advocating political pluralism to supporting centralized planning. Finally, this paper illustrates the complex relationship between political theory and metaphysics. (shrink)

This book is a rather mediocre and unimaginative summary of the major themes of Avicenna's metaphysics. Chahine makes the attempt to situate him against the background of antique and medieval philosophy, but the ideas themselves are never given a contextual treatment. One does not see what was truly original and significant in Avicenna's philosophy; one is left frustrated by the succession of scholastic lieux communs and only seldom gratified by a beautiful quote. There is a certain amount of information on (...) the ideas of other Islamic thinkers influencing Avicenna or influenced by him, but this cannot compensate for the lack of a really penetrating analysis—M. J. V. (shrink)

Anachronistic values A value becomes anachronistic when it no longer fits current historical conditions (institutions, technology, culture, etc.). From an ‘idealist’ perspective, this fact does not tell against the old value (accepted as true), but rather against the new conditions. However, from a ‘naturalist’ perspective which takes values to be the product of human interests and (therefore) as interconnected with a given historical context, such a conflict seems to make a value obsolete. But this is neither an empirical law nor (...) a normative rule. A defence of anachronistic values might still be perfectly reasonable. It is argued that such reasonableness depends mainly on three criteria: (un)certainty, scope and weight. (shrink)