Shape perception and reproduction in normal children and mongol and non-mongol imbeciles.
HERMELIN
B
B
O'CONNOR
N
N
D002648:Child; D004314:Down Syndrome; D006801:Humans; D008607:Intellectual Disability; D010465:Perception; D013028:Space Perception; D014796:Visual Perception
MENTAL DEFICIENCY; MONGOLISM; SPACE PERCEPTION; VISUAL PERCEPTION