analysis would identify the effort that Tony a’s parent did for their child in using
the first language and other factors influencing the language development of Tonya. Finally, the formulated problems could be answered clearly.
1.5.4 Method and Technique of Presenting the Data
This study uses the descriptive method in presenting the data related to the subject of this study. There are two problems discussed in this study. In order to
answer the first problem, the data were classified into some categories of language development of children generally based on Owens. The analysis of the language
development categories were explained descriptively with the example for each category. Then, the data was compared with Tonya as the subject of this study.
Meanwhile, in order to answer the second problem, the factors that influence Tonya in acquiring her language are also classified with the deep explanation of
each factor.
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CHAPTER II LITERARY REVIEWS, CONCEPTS, THEORITICAL FRAMEWORK
2.1 Literary Reviews
The literary review is the description about the strength and the weakness from previous studies and how the relevancy between the previous study with
this study. In supporting this study, there are three reviews of previous thesis and two international articles collected as the references of this study.
2.1.1 Thesis Reviews
The first undergraduate thesis is from Risnawati 2008 entitled “First
Language Acquisition of Second Year Old Children in Terms of English Vocabularies and The Structure of Sentences”. In this paper, she explained the
background of her study from the general to the specific. In her study, there are three problems, those are; first, how is development of the language acquisition
of second year old children acquiring English vocabularies and second is how the structure of the sentences of second year old children and the third is what
are the factors influencing language development in acquiring English vocabularies and the structure of their sentences. In solving the formulated
problems, she gave three theories, those are behavioristic, nativist, and functional. She explained it clearly based on the theory. That is the strength of
her study. However, there is several weakness of her study, first, in the
