Publications des institutions partenaires

S'abonner aux flux infonet economy   4541 - 4560 of 5584

Interhemispheric integration of visual processing during task-driven lateralization

The mechanisms underlying interhemispheric integration (IHI) remain poorly understood, particularly for lateralized cognitive processes. To test competing theories of IHI, we constructed and fitted dynamic causal models to functional magnetic resonance data from two visual tasks that operated on identical stimuli but showed opposite hemispheric dominance. Using a systematic Bayesian...

Full Text

English / 01/01/2007

Approaches to the cortical analysis of auditory objects

We describe work that addresses the cortical basis for the analysis of auditory objects using 'generic' sounds that do not correspond to any particular events or sources (like vowels or voices) that have semantic association. The experiments involve the manipulation of synthetic sounds to produce systematic changes of stimulus features, such as spectral envelope....

Full Text

English / 01/01/2007

Neurophysiological correlates of relatively enhanced local visual search in autistic adolescents

Previous studies found normal or even superior performance of autistic patients on visuospatial tasks requiring local search, like the Embedded Figures Task (EFT). A well-known interpretation of this is "weak central coherence", i.e. autistic patients may show a reduced general ability to process information in its context and may therefore have a tendency to favour local...

Full Text

English / 01/01/2007

Extra-classical receptive field effects measured in striate cortex with fMRI

The aim of this study was to measure the contextual influence of globally coherent motion on visual cortical responses using functional magnetic resonance imaging. Our motivation was to test a prediction from representational theories of perception (i.e. predictive coding) that primary visual responses should be suppressed by top-down influences during coherent motion. We used a...

Full Text

English / 01/01/2007

Mechanisms of hemispheric specialization: insights from analyses of connectivity

Traditionally, anatomical and physiological descriptions of hemispheric specialization have focused on hemispheric asymmetries of local brain structure or local functional properties, respectively. This article reviews the current state of an alternative approach that aims at unraveling the causes and functional principles of hemispheric specialization in terms of asymmetries in...

Full Text

English / 01/01/2007

Models of effective connectivity in neural systems

It is a longstanding scientific insight that understanding processes that result from the interaction of multiple elements require mathematical models of system dynamics (von Bertalanffy 1969). This notion is an increasingly important theme in neuroscience, particularly in neuroimaging, where causal mechanisms in neural systems are described in terms of effective connectivity. Here,...

Full Text

English / 01/01/2007

The appearance of figures seen through a narrow aperture under free viewing conditions: effects of spontaneous eye motions

When moving figures are occluded and revealed piecemeal as they move across a narrow slit, observers may perceive them as integrated but distorted. They may also perceive much more of the figure as simultaneously visible than is actually presented at any moment. We obtained quantitative measures of both the perceived distortion and perceived simultaneity under free viewing conditions...

Full Text

English / 01/01/2007

An economic perspective on transfer pricing

This chapter reviews the recent economic literature on transfer pricing. As a starting point, we take Hirshleifer's transfer pricing model and discuss the basic structure of the most widely used model extensions. We review transfer pricing models with asymmetric information, transfer pricing models in incomplete contracting settings, strategic transfer pricing models, and...

Full Text

English / 01/01/2007

An economic perspective on transfer pricing

This chapter reviews the recent economic literature on transfer pricing. As a starting point, we take Hirshleifer's transfer pricing model and discuss the basic structure of the most widely used model extensions. We review transfer pricing models with asymmetric information, transfer pricing models in incomplete contracting settings, strategic transfer pricing models, and...

Full Text

English / 01/01/2007

Pagine

Le portail de l'information économique suisse

© 2016 Infonet Economy