Objective To identify specific behaviors detrimental to language development in parent-child inter-actions among Mandarin-speaking infants and toddlers with language delays,and to provide a foundation for develo-ping parent-involved early intervention programs that enhance language acquisition.Methods A qualitative research design was used,employing interaction analysis and categorical analysis methods.Observations from 30 parent-child interaction videos involving children with delayed language development were analyzed to identify common detrimen-tal behaviors(coding).The validity of the qualitative findings was tested by analyzing 108 parent-child where low-quality parental interactions were identified and provided with five rounds of constructive feedback.Results Two major categories of detrimental behaviors with three aspects and a total of 10 issues were identified:5 issues related to parental interaction skills,3 issues related to mutual influences between parent and child,and 2 issues related to the interaction environment.After 5 rounds of feedback,detrimental behaviors in the 108 parent-child pairs im-proved significantly,with 8 behaviors met the 80％stability standard.Conclusion The study identified and catego-rized behaviors in parent-child interactions that hinder language development in children with language delays.Video-based behavior analysis and feedback can enhance parental interaction skills and create a conductive environ-ment for early language development.

Objective To identify specific behaviors detrimental to language development in parent-child inter-actions among Mandarin-speaking infants and toddlers with language delays,and to provide a foundation for develo-ping parent-involved early intervention programs that enhance language acquisition.Methods A qualitative research design was used,employing interaction analysis and categorical analysis methods.Observations from 30 parent-child interaction videos involving children with delayed language development were analyzed to identify common detrimen-tal behaviors(coding).The validity of the qualitative findings was tested by analyzing 108 parent-child where low-quality parental interactions were identified and provided with five rounds of constructive feedback.Results Two major categories of detrimental behaviors with three aspects and a total of 10 issues were identified:5 issues related to parental interaction skills,3 issues related to mutual influences between parent and child,and 2 issues related to the interaction environment.After 5 rounds of feedback,detrimental behaviors in the 108 parent-child pairs im-proved significantly,with 8 behaviors met the 80％stability standard.Conclusion The study identified and catego-rized behaviors in parent-child interactions that hinder language development in children with language delays.Video-based behavior analysis and feedback can enhance parental interaction skills and create a conductive environ-ment for early language development.

Objective:To study the correlation between early postsurgery phonetic acquisition of speech stop and speech outcomes of young children.Methods:28 children with cleft palate were included in the study.An one-stage palatal repair procedure was per-formed by one surgeon for the children before the age of 1 8 months.Naming tests were used in the speech therapy room when the chil-dren were aged 23 months and 30 months.Stop consonant inventory number,percent correct consonants(PCC),percent correct man-ners(PCM)and percent correct places(PCP)were analyzed.Results:Number of stop consonant was significantly correlated with PCC,PCM and PCP at 24 and 30 months of age in the children.Coefficient of determination between stop consonant number and PCC was 0.535.Conclusion:Speech stop may be used as the “sensitive sound”for the analysis of speech development of the chinese children aged 2-3 years after cleft palate repair and as the individuation guideline to determine the best assessment and therapy time.