Looking out from the isolator: David's perception of the world.
David, who from September 1971 to February 1984 actively lived his life in a sterile isolator, was severely deprived of experience of the physical world. His difficulty with the concepts of space, depth, and size related clearly to his limited experience rather than to cognitive or visual-motor-perceptual deficits.
D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003867:Depth Perception; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000523:psychology*; D007360:Intelligence; D008297:Male; D010356:Patient Isolation / Q000523:psychology*; D010357:Patient Isolators; D012858:Size Perception; D012931:Social Environment; D012938:Social Perception; D013028:Space Perception; D013998:Time Perception; D014796:Visual Perception