【正确答案】正确答案：Since language has both individual and social aspects, it is naturally of interest to psychologists and sociologists among others. Many psychologists are interested to investigate the interrelation of language and mind, in processing and producing utterances and in language acquisition for example, language development in the child, such as the theories of language acquisition; biological foundations of language , and a big topic—the relationship between language and cognition, so there are psycholin-guistics. Socialists who are interested in the relations between language and society do researches concerned both sociology and linguistics, including the social functions of language and the social characteristics of its users. When anthropologists enlisted the help of linguists to study unwritten languages, anthropology and linguistics became closely associated in the early days of anthropological fieldwork. In contrast with other linguists, anthropological linguists are interested primarily in the history and structure of formerly unwritten languages. They are concerned with the emergence of language and also with the divergence of languages over thousands of years. Therefore, it is not surprising there are some branches of macrolinguistics that show an interdisciplinary nature.