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CHAPTER III METHODOLOGY
This chapter presents discussion about the method used in the research. This chapter is divided into six parts which are research method, research
participant, research instruments, data gathering technique, data analysis technique, and research procedure.
A. Research Method
This research is done by qualitative approach since it provides descriptive information about types and functions of code switching done by the English
teacher of SMK N 2 Depok Sleman. According to Strauss and Corbin 1990, qualitative research means any kind of research that produces findings not arrived
at by means of statistical procedures or other means of quantification. Qualitative researchers study things in their natural settings, attempting to make sense of, or
to interpret, phenomena in terms of the meanings people bring to them Denzin, 1994. The primary aim of a qualitative research is to provide a complete, detailed
description of the research topic. It is usually more exploratory in nature. This research belongs to case study. Case study is conducting an empirical
investigation of a contemporary phenomenon within its natural contexts using multiple sources of evidence Yin, 2003. In this case, the researcher takes the
respondent from the English teacher of SMK N 2 Depok Sleman. This research also belongs to document analysis. According to Fraenkel Wallen 2008,
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document analysis is a technique that enables researcher to study human behavior in an indirect way, through an analysis of their communications. In this study, the
document refers to the recording of teaching learning activities in English classrooms. The purpose of this research is to describe the types and functions of
code switching done by the English teacher when teaching the eleventh grade students of SMK N 2 Depok Sleman.
B. Research Participant
The participant of this research is the English teacher of SMK N 2 Depok Sleman
. The research participant was chosen purposively. Purposive sampling is constructed to serve a very specific need or purpose of the research. Kerlinger
1986 explained purposive sampling as another type of non-probability sampling, which is characterized by the use of judgment and a deliberate effort to obtain
representative samples by including typical areas or groups in the sample. The age of the participant was about 30 year-old. The English teacher has been learning
and using English for more than ten years and has been teaching English for about 5 years.
C. Research Instruments
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