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Types of Interruption SIM
: Simple Interruption OVE
: Overlap Interruption BUT
: Butting-in Interruption SIL
: Silent Interruption
Functions of Interruption DIS : Disagreement
REJ : Rejection FLO : Floor-Taking
TOP : Topic-Change TAN : Tangentialization
AGR: Agreement ASS : Assistance
CLA : Clarification COL : Collaborative Completion
F. Trustworthiness of the Data
To obtain a trustworthy research, researchers should ensure that their findings and interpretations are valid and reliable. Guba 1981: 80 suggests four
criteria which can be used to measure research trustworthiness, namely credibility, transferability, dependability, and confirmability. In this study, two of the criteria,
that is, credibility and confirmability, were implemented to promote the trustworthiness of the data. Credibility refers to the accuracy of the findings. The
findings are called credible if they accurately describe the subject of investigation. Confirmability, furthermore, is related to the objectivity of the findings. It checks
whether the findings
are not derived from the researcher’s own perceptions
but really based on the information gained from the context in which the data are
taken. To fulfil the credibility and confirmability criteria, the researcher carried
out triangulation. According to Denzin in Guba, 1981: 85, triangulation involves authenticating the research findings through multiple evidence, i.e. data sources,
theories, investigators, and methods. With regard to this research, the data trustworthiness using the triangulation method was attained by cross-checking the
data through theories and investigators. To perform the theory triangulation, the
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researcher adopted and combined theories from different scholars to answer the research problems. In the case of the investigator triangulation, the researcher
asked for the assistance of two fellow students who major in linguistics to review the research findings and interpretations. Additionally, in order to corroborate the
accuracy of the triangulated findings, the researcher also consulted with her supervisors regarding the results of the study.
