2. The researcher identified the character‟s utterances to categorise the kind of
responses and the features of autistic person 3.
The researcher recorded and interpreted the data into data sheets 4.
The researcher conducted the data triangulation by asking lecturers and friends 5.
The researcher took the conclusions based on the result of the research
F. Trustworthiness of the Data
Lincoln and Guba in Elliott, 2004 explain that to gain trustworthiness, the data must be checked against four criteria: credibility, transferability,
dependability, and conformability criteria. The researcher used the first level, credibility.
Credibility is a concept of internal validity which refers to the extent to which the findings describe the reality accurately to achieve the credibility of the
data. The researcher performed deep and detailed observation on the data, so the data could be regarded credible. The researcher read the data carefully and
comprehensively until the researcher got certainty that the data were in accordance with the research questions. The credibility of the data is also to get
through triangulation. Denzin in Berg, 2001:5 says that triangulation is lines of action that are used to describe multiple data-collection technologies, multiple
theories, multiple researchers, multiple methodologies, or combinations of these four categories of research activities.
In this research, the types of triangulation technique were by theories and researcher. There were some theories used in the process to support the findings
and analyse the data. The researcher also employed triangulation by researcher.
Although this research was only done by one researcher, this research was always consulted to two consultants in order to confirm the data. The researcher consulted
her findings and data analysis to Titik Sudartinah, M.A., the first consultant, and Rachmat Nurcahyo, M.A., the second consultant. This research was also
triangulated b y the researcher‟s friends, Ferri Dwi Agustina and Kristiana Tri
Wahyuni. Both of them are students of English Language and Literature study program of Yogyakarta State University majoring in linguistics.
