high-level perception during spatial navigation

To identify electrophysiological correlates of change detection, event-related brain potentials (ERPs) were recorded while participants monitored displays containing four faces in order to detect a face identity change across successive displays. Successful change detection was mirrored by an N2pc

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n It is usually held that perceptual spatial stability, despite smooth pursuit eye movements, is accomplished by comparing a signal re�ecting retinal image slip with an internal reference signal, encoding the eye movement. The important consequence of this concept is that our subjective percept of visual motion re�ects the outcome of this comparison rather than retinal image slip. In an attempt to localize the cortical networks underlying this comparison and therefore our subjective percept of visual motion, we exploited an imperfection inherent in it, which results in a movement illusion. If smooth pursuit is carried out across a stationary background, we perceive a tiny degree of illusionary background motion (Filehne illusion, or FI), rather than experiencing the ecologically optimal percept of stationarity. We have recently shown that this illusion can be modi�ed substantially and predictably under laboratory conditions by visual motion unrelated to the eye movement. By making use of this �nding, we were able to compare cortical potentials evoked by pursuit-induced retinal image slip under two conditions, which differed perceptually, while being identical physically. This approach allowed us to discern a pair of potentials, a parieto-occipital negativity (N300) followed by a frontal positivity (P300), whose amplitudes were solely determined by the subjective perception of visual motion irrespective of the physical attributes of the situation. This �nding strongly suggests that subjective awareness of visual motion depends on neuronal activity in a parietooccipito-frontal network, which excludes the early stages of visual processing. n

, and a higher-order judgement of agency, which attributes sensory events to the self. In the current study we explore the neural correlates of the judgement of agency by means of electrophysiology. We measured event-related potentials to tones that were either perceived or not perceived as triggered

People with schizophrenia consistently report normal levels of pleasant emotion when exposed to evocative stimuli, suggesting intact consummatory pleasure. However, little is known about the neural correlates and time course of emotion in schizophrenia. This study used a well-validated affective

The aim of this article is to provide a selective review of event-related potential (ERP) research on second language processing. As ERPs have been used in the investigation of a variety of linguistic domains, the reported studies cover different paradigms assessing processing mechanisms in the second language at various levels, ranging from phoneme discrimination to complex sentence process-ing. Differences between ERP patterns of first language (L1) and second language (L2) speakers can help to specify and to test predictions derived from models of L2 processing or hypotheses concerning critical periods for some aspects of second language acquisition. The studies currently available suggest that ERPs are indeed sensitive to qualitative and quantitative differences in L2 speakers with regard to on-line processing. I

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blindness studies, both from behavioral and electrophysiological experiments. Mechanisms of change detection and change blindness are discussed, highlighting the role of visual attention for conscious change perception.