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.