Objective To revise the standards of the Language Function Evaluation for Hearing-impaired Children and to study the characteristics of language functions in hearing-impaired children.Methods A total of 741 normal hearing children at the age of 3~7 year old from 15 provinces in China were assessed using the Language Function Evaluation for Hearing-impaired Children.A total of 90 hearing-impaired children also completed the e-valuation.The scores of Representation Function,Tool Function,Coordination Function,Expression Function, Entertainment Function and Comprehensive Function of all the children were collected.ResuIts The regression e-quations of the language function were established:Representation Function score=3.34 +0.81 ×children's age, Tool Function score =6.00+0.51×children's age,Coordination Function score =5.72 +0.52 ×children's age,Ex-pression Function score =4.44+0.67×children's age,Entertainment Function score =6.34+0.47×children's age, Comprehensive Function score =4.96+0.62×children's age;Through the regression analysis,the reference stand-ards of the tool for children at the age of 3~6 year old were set down.Five-year-old hearing-impaired children's Tool Function and Expression Function were better than those of three or four-year-old ones(P<0.05).Five-year-old hearing-impaired children's Comprehensive Function were better than those of three-year-old ones(P<0.05).The language function scores had a big gap between the hearing-impaired children and the hearing-nor-mal children at the same ages.ConcIusion The new reference standards of the Language Function Evaluation for Hearing-impaired Children provides the Expectation values and Minimum values of language function from children at the age of 3 -6.They are rehabilitation criterions for hearing-impaired children.The older the hearing-im-paired children are,the higher their scores of language function evaluation.But their scores are much lower than those of the normal hearing children at the same age.

Objective To study the characteristics of language function development and establish the reference standards in children of4~6 years old. Methods 616 hearing normal children at the age of 3~7 from 13 provinces in China were assessed with Language FunctionEvaluation for Hearing-impaired Children. 583 usable data were analyzed via SPSS 17.0. Results The older the children were, the highertheir scores of language function evaluation were (P<0.001). The differences between boys and girls on coordination function and relaxationfunction were significant (P<0.01). The girls were better than the boys. The reference standards of children of 4~6 years old were set downbased on the regression analysis. Conclusion There are some laws on children's language function development. The reference standards ofchildren by 4~6 years old has been developed.