title: [The related factors influencing development of language understanding and expression of early-children].
abstract: OBJECTIVE
  To assess the level of language understanding and expression of healthy children aged from 8 to 16 months in urban Beijing and to investigate the children's physical and psychological development conditions and social and economic status of children's family as to identifying the related factors to children's language development and providing a basis for instructing parents child-rearing and promoting early children language development.
  
  
  METHODS
  A quantitative Cross-sectional Study was made. The parents or care givers of 636 healthy young children, randomly stratified and selected in two districts in Beijing were interviewed. T-test was used to compare the scores of language understanding and expression between boys and girls in the same age. Single and multiple factors analysis were used so as to find out the related factors.
  
  
  RESULTS
  For boys, the average scores of language were respectively 115.0 for 8 months, 243.0 for 12 months and 410.6 for 16 months; for girls the average scores were respectively 109.9 for 8 months, 286.4 for 12 months and 456.2 for 16 months. The average score of language understanding of boys was higher than that of girls only in the 11 month group. The average scores of language expression of girls were higher than those of boys in 11, 12, 14, 15 month groups. Multiple factors analysis showed that parent-child book reading, parent-child tape listening, higher education level of grandmothers, children' extroversion personality, child being able to speak one word and children's age were positively related to the children' language score.
  
  
  CONCLUSIONS
  Providing rich language environment should be helpful to early children's language development.
authors.affiliation: Department of Obstetrics and Gynecology, First Hospital, Beijing University, Beijing 100034, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Hao
authors.forename: Wei-lan
authors.initials: WL
authors.lastname: Liang
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.forename: Zhi-xiang
authors.initials: ZX
authors.lastname: Zhang
authors.forename: Qi-hua
authors.initials: QH
authors.lastname: Zuo
authors.forename: Tardif
authors.initials: T
authors.lastname: T
authors.forename: Fletcher
authors.initials: F
authors.lastname: P
mesh_terms: D002681:China; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D007804:Language Development; D008297:Male; D011932:Reading; D013060:Speech; D011795:Surveys and Questionnaires; D014505:Urban Population / Q000706:statistics & numerical data