title: Arbitrary symbol learning by adults with severe mental retardation: comparison of lexigrams and printed words.
authors.affiliation: Parsons Research Center, University of Kansas 67357, USA.
authors.forename: N C
authors.initials: NC
authors.lastname: Brady
authors.forename: L K
authors.initials: LK
authors.lastname: McLean
mesh_terms: D000328:Adult; D003143:Communication Devices for People with Disabilities; D004193:Discrimination Learning; D004495:Education of Persons with Intellectual Disabilities; D005260:Female; D005556:Form Perception; D006801:Humans; D008607:Intellectual Disability / Q000523:psychology / Q000534:rehabilitation*; D007804:Language Development; D008297:Male; D008875:Middle Aged; D012153:Retention, Psychology; D014825:Vocabulary