LATERALIZATION: The tendency for certain processes to be handled more efficiently on one side of the brain than on the other. In most people, the right hemisphere becomes more efficient in processing spatial information, while the left hemisphere specializes in verbal and logical processes. Considered a factor when determining if both brain hemispheres are ‘sharing’ information (bilateral coordination).

LEARNING DISORDER: A difficulty in learning to read, write, compute, or do school work that cannot be attributed to impaired sight or hearing, or to mental retardation.