Neuroscientists at MIT and Boston University have discovered that a basic mechanism underlying sensory perception is deficient in individuals with dyslexia, according to study published December 00 in Neuron. The brain typically adapts rapidly to sensory input, such as the sound of a person's voice or images of faces and objects, as a way to make processing more efficient. But for individuals with dyslexia, the researchers found that adaptation was on average about half that of those without the disorder.