Visual perception: myths and mechanisms

Article Abstract:

Scientists have challenged the classical receptive field (CRF) theory of visual perception during the workshop titled 'Mechanisms Involved in Visual Perception' held on Feb 23-25, 1998 in Madrid, Spain. CRF states that scotomas are filled-in by isolated neural detectors. Studies conducted by Adam M. Sillito suggested that a network of interacting neural networks was involved in visual perception. Furthermore, Yves Fregnac observed a spatial distribution of neuronal activity. Other studies analyzed the anatomical and physiological basis of visual perception.

Analysis, Physiological aspects, Vision research, Vision

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'My most true mind thus makes mine eye untrue.' (on sensory and perceptual events)

Article Abstract:

J.A. Assad and J.H.R. Maunsell have carried out a landmark study on how neural activity contributes to direct or modal sensation-perception relationships. Their research, which involved training rhesus monkeys to look at three visual stimuli, helps to explain the difference between a person's visual perception of his surroundings and the retinal image. In disconnecting perceptual and sensory events, they showed that 'a depictive form of the neuronal representation remains invariant despite the increasing remoteness of sensory context.'

Sensory discrimination

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Evidence for multi-functional interactions in early visual motion processing

Article Abstract:

Two experiments which show that the strict modularization of the visual function is not possible are discussed. The first experiment was done by Yantis and Nakayama, who discovered that the recognition of stationary, non-moving characters is compromised along paths of perceived motion. The second experiment, conducted by Sekuler and colleagues, showed that acoustic stimuli can influence the perceptual organization of visual motion. Their findings challenge the notion that information processing in early vision can be modularized.

Motion perception (Vision), Motion perception, Human information processing in children, Childhood information processing, Visual perception in children, Childhood perception

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