Task difficulty and task performance in autistic children.
D000124:Achievement; D000293:Adolescent; D001288:Attention; D001321:Autistic Disorder / Q000523:psychology*; D002648:Child; D003118:Color Perception; D004193:Discrimination Learning; D006801:Humans; D009042:Motivation; D010364:Pattern Recognition, Visual; D011340:Problem Solving; D011581:Psychological Tests