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However, these divisions in Parsons' theory are the more formal ways in which the evolutionary process is conceptualized, and should not be mistaken for Parsons' actual theory. Parsons develops a theory where he tries to reveal the complexity of the processes which take form between two points of necessity, the first being the cultural ...
The second phase began in the late 1970s . In 1976 Chomsky formulated the fundamental questions of biolinguistics as follows: i) function, ii) structure, iii) physical basis, iv) development in the individual, v) evolutionary development. In the late 1980s a great deal of progress was made in answering questions about the development of language.
Shriberg (1993) [13] proposed a model for speech sound acquisition known as the Early, Middle, and Late 8 based on 64 children with speech delays ages 3 to 6 years. Shriberg proposed that there were three stages of phoneme development. Using a profile of "consonant mastery" he developed the following: Early 8 – /m, b, j, n, w, d, p, h/
Social interactionist theory (SIT) is an explanation of language development emphasizing the role of social interaction between the developing child and linguistically knowledgeable adults. It is based largely on the socio-cultural theories of Soviet psychologist, Lev Vygotsky .
Human development theory is a theory which uses ideas from different origins, such as ecology, sustainable development, feminism and welfare economics. It wants to avoid normative politics and is focused on how social capital and instructional capital can be deployed to optimize the overall value of human capital in an economy.
Some language development experts have characterized child directed speech in stages. Primarily, the parents use repetition and also variation to maintain the infant's attention. Secondly, the parent simplifies speech to help in language learning. Third, any speech modifications maintain the responsiveness of the child.
The gestural theory states that speech was a relatively late development, evolving by degrees from a system that was originally gestural. Human ancestors were unable to control their vocalisation at the time when gestures were used to communicate; however, as they slowly began to control their vocalisations, spoken language began to evolve.
Parsons had asked Schutz to give a presentation at the rationality seminar, which he did on April 13, 1940, and Parsons and Schutz had lunch together afterward. Schutz was fascinated with Parsons' theory, which he regarded as the state-of-the-art social theory, and wrote an evaluation of Parsons' theory that he kindly asked Parsons to comment.