News Archive

Discovering and Treating a New Form of Reading Impairment

Magnetic resonance angiogram

We have discovered a previously unknown perceptual deficit that selectively affects the ability to see letters and numbers. Two cases of the impairment (which we are calling Alphanumeric Visual Awareness Disorder, or AVAD) have been identified, and we are actively searching for additional cases, probing the causes and consequences of the disorder, and working to...

Representation of Visual Location and Orientation

This project uses cognitive neuropsychological methods and studies of normal adults and children to explore how the brain represents two very basic properties of visual stimuli: location and orientation.

Representations and Computations in the Lexical System

In this project cognitive neuropsychological studies of brain-damaged patients reveal properties of the computational architecture and orthographic representations that underlie reading and spelling performance.