title: Complexity and position of stimuli as determinants of looking behavior in retardates and normals.
mesh_terms: D000124:Achievement; D000293:Adolescent; D000328:Adult; D001288:Attention; D002648:Child; D005556:Form Perception; D006801:Humans; D008607:Intellectual Disability; D007361:Intelligence Tests; D011581:Psychological Tests