The link between perception and production of speech in bilingual children

Background section: include the importance of the connection between perception and production of speech. especially in bilingualism, and the studies that have been done to investigate this link. and what does this help in terms of treating children with speech difficulties objective: to know more about the link in order to treat children with speech difficulties. maybe after researching, come up with a way to monitor case studies throughout the years to see the progress. if there was. methodologies: quantitative, case studies.