语言发育迟缓目前尚无统一的诊断标准。有些学者提出，１８个月小儿尚未学会１０个单音词和３－４岁仍无语言表现者应认为语言发育迟缓。有的学者认为１名小儿年龄已２岁至２岁半尚无语言表现者，应属语言发育迟缓。小儿语言发育迟缓可能是由精神发育迟滞，或在婴儿期就已有听 There is no uniform diagnostic criteria for speech retardation at present. Some scholars suggest that 18-month-old children have not yet learned 10 monosyllabic words and 3-4 years of age still have no language performance should be considered language retardation. Some scholars believe that a child aged 2 to 2 years and a half still no language performance, should be language retardation. Pediatric speech retardation may be due to mental retardation, or have been heard in infancy