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3. Interview
The third instrument used in this research is interview. Patton 1990 writes about three types of qualitative interviewing: 1 informal, conversational
interviews; 2 semi-structured interviews; and 3 standardized, open-ended interviews. Interview is chosen in order to get the data about the functions of code
switching in English learning. According to Bogdan and Biklen 1982, qualitative interviews may be used either as the primary strategy for data
collection, or in conjunction with observation, document analysis, or other techniques. In this research, the type of questions used in the interview is open-
ended questions. Qualitative interviewing utilizes open-ended questions that allow for individual variations. In this research, the researcher became the interviewer,
while the English teacher of the eleventh grade students of SMK N 2 Depok Sleman
became the interviewee.
D. Data Gathering Technique
In gathering the data, there were three steps conducted. The researcher recorded the teaching-learning activities of the eleventh grade students of SMK N
2 Depok Sleman in the English classes. After that, the researcher interviewed the
English teacher and conducted library study. First, the researcher attended the English classrooms in which the English
teacher taught the eleventh grade students of SMK N 2 Depok Sleman. After that the researcher recorded the teaching-learning activities in the classroom. The
observation was done in order that the researcher could get the data about types of
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code switching done by the English teacher of SMK N 2 Depok Sleman. After recording the teaching-learning activities in the classroom, the researcher
conducted the document observation. In doing the observation, the researcher used observation checklist and notes as the instruments of the observation. The
observation checklist consisted of column of the types and functions of code switching and the column to be filled by the words or sentences of code
switching. The observation checklist was used to identify the types and functions of code switching done by the English teacher of SMK N 2 Depok Sleman. In
doing the observation the researcher also took notes if there were any types of code switching outside the observation checklist.
Second, the researcher conducted the interview. The interview was conducted in order that the researcher could gather the data about functions of
code switching done by the English teacher of SMK N 2 Depok Sleman. The interview also aimed to get the data about the effectiveness of doing code
switching in English learning. The researcher was going to find out the teacher opinion whether or not code switching could help English learning. The interview
was held in May 18, 2013 after the English class. Third, the researcher conducted library study. The library study aimed to
compare the result of the interview about the effectiveness of code switching in English learning with some theories which support the findings of the interview.
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E. Data Analysis Technique
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