To establish a basis for prognosis in stammering.
D000293:Adolescent; D002648:Child; D004292:Dominance, Cerebral; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D009048:Motor Skills; D010552:Personality Assessment; D011379:Prognosis; D012923:Social Class; D013342:Stuttering / Q000175:diagnosis* / Q000209:etiology