A DEVELOPMENTAL DEFICIT IN LOCALIZING OBJECTS FROM VISION

We describe a college student, A.H., with a developmental deficit in d etermining the location of objects from vision. The deficit is selecti ve in that (a) localization from auditory or tactile information is in tact; (b) A.H. reports the identity of mislocalized objects accurately ; (c) visual localization errors preserve certain parameters of the ta rget location; and (d) visual localization is severely impaired under certain stimulus conditions, but nearly intact under other conditions. These results bear on the representation and processing of location i nformation in the visual system, and also have implications for unders tanding developmental dyslexia.