Influence of motion signals on the perceived position of spatial pattern

Article Abstract:

When the visual system of motion of a pattern in a certain direction is adapted, a static patters seems to move in the opposite direction, known as the motion aftereffect (MAE). The MAE may not be accompanied by a change in perceived spatial position of the pattern being observed. However the perceived orientation of a static windmill pattern was measured after adaptation to rotary motion, and a gradual shift in orientation in the direction of the illusory rotation was found. The orientation shift persisted no longer than the MAE.

Motion

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Infants listen for more phonetic detail in speech perception than in word-learning tasks

Article Abstract:

Infants of 10-12 months can discriminate only phonetic variations used to distinguish meaning. A new technique shows that infants of 14 months do not use fine phonetic detail detected in syllable discrimination tasks, but infants of eight months can successfully make that discrimination. This suggests reorganizations of perceptual sensitivities as infants move from listening to syllables to learning words.

Research, Physiological aspects, Learning, Speech perception in children, Childhood speech perception

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Neural noise limitations on infant visual sensitivity

Article Abstract:

It is shown that infant visual sensitivity is restricted by high noise levels in the neural transduction process. Intrinsic neural noise in neonates is about nine times higher than in adults, and as it decreases during infancy, contrast sensitivity improves in proportion. Contrast gain control was found to be in place and operating in infants as young as six weeks, despite high neural noise levels.

Neural receptors

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