The emphasis of my current research is on information processing in the visual system. Specifically, I am concerned with the relationship between low level sensory processes, higher level visual cognition, and sensorimotor integration. My goal is to answer the question how complex scenes and objects are perceived in a natural environment, how they are represented in the brain, and how the visual information is used to drive the motor system.
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This book is a basic introduction to the brain mechanisms of perception. It is meant to be easy reading for those new to the field, especially first year students of Psychology, Biology, or Computer Science. More information about the book is available at Fischer Taschenbuch Verlag, where the book can be ordered. You can also order from Amazon. |
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A comparison
of pursuit eye movement and perceptual performance in speed
discrimination We determined psychophysical thresholds for detecting small
perturbations in the speed of moving patterns, and then by an ideal
observer analysis computed analogous “oculometric” thresholds from the
eye movement traces elicited by the same stimuli on the same trials.
We found a remarkable agreement between perceptual judgments for speed
discrimination and the fine gradations in eye movement speed. When we
compared the errors for perception and pursuit on a trial-by-trial
basis
there was no correlation between perceptual errors and eye movement
errors. This suggests that the motor system and perception share the
same constraints in their analysis of motion signals, but act
independently and have different noise sources. |
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Die 46. Tagung experimentell
arbeitender Psychologen (TeaP) findet vom 04. bis 07. April 2004 an der
Justus-Liebig-Universität Giessen statt. Die TeaP bietet ein Forum
zur Präsentation und Diskussion neuer Forschungsbeiträge aus
allen Bereichen der experimentellen Psychologie. |
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The perception of colour is a central component of primate
vision. Colour facilitates object perception and recognition, and has
an
important role in scene segmentation and visual memory. Moreover, it
provides an aesthetic component to visual experiences that is
fundamental to our perception of the world. Despite the long history
of colour vision studies, much has still to be learned about the
physiological basis of colour perception. Recent advances in our
understanding of the early processing in the retina and thalamus have
enabled us to take a fresh look at cortical processing of colour. These
studies are beginning to indicate that colour is processed not in
isolation, but together with information about luminance and visual
form, by the same neural circuits, to achieve a unitary and robust
representation of the visual world. Gegenfurtner, |
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Summer
school on Visual Neuroscience, Sponsored by the Volkswagen-Stiftung, organized by Jochen
Braun ( Vision is one of the most active and important areas of neuroscience today. The sense of urgency and timeliness shared by vision researchers derives equally from the prospect of identifying the neural underpinnings of visual sensations, that is, of deciphering the language of the brain, and from the promise of finally boosting the capabilities of artificial vision (and prostheses) to the levels attained by biology, both developments with potentially enormous cultural and practical consequences. The school aims to expose young vision
researchers --- at the late pre-doctoral or early post-doctoral level
--- to the principal methods and seminal issues of contemporary visual
neuroscience, as outlined above. The range of topics will be broad,
literally from spikes to awareness, and the pace correspondingly brisk.
This intensive experience will allow participants take a broader view
of, and make more informed decisions about, their future research
direction. If properly organized, the
formative effect of such a summer school on budding careers can hardly
be overstated. |
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Graduiertenkolleg NeuroAct |
