31 personal information as possible for further development. Multiple data collection
instruments were used to make sure the reliability of the research result in finding out the why and how the social happening, in this case the implementation of CBI
principles in immersion class, took place. They were expected to provide a clear and comprehensive result.
1. Interview
Seliger and Shohamy state that an interview is conducted to obtain information from the subjects by actually talking to them 1989. In other words,
an interview is the equivalent of a questionnaire but in a spoken form. In this study, the aim of conducting an interview was to gather related information to the
research problems so there would be more credible and complete data. The choice of this particular research instrument was supported by Sutrisno Hadi 1989 who
describes an interview as a kind of method to gather data through questions and answers done systematically and based on the research purpose.
The researcher interviewed the research participant, P-Man, after school. The questions were delivered in Indonesian to avoid misunderstandings and the
participant was given a liberty to choose whether he wanted to answer in English or Indonesian. He then chose to give answers in Indonesian.
The questions posed in the interview revolved mostly around the participant. Evelyn Hatch and Hossein Farhady 1982 propose that we could ask
questions about age, sex, first language background, cognitive style, or many other individual personality characteristics of the learner. Thus, the list of
questions prepared by the researcher was emphasized on the learner factor that
PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI
32 potentially affects his English grammar accuracy. Besides, there were also
questions related to the implementation of several principles of Content-based Instruction in his immersion class and the participant’s opinion on it.
2. Collection of Existing Information
Johnson 1992 describes collection of existing information as students’ written work or test data. In this study, the researcher collected the research
participant’s test results consisting of two English compositions to be analyzed in terms of the application of Subject-Verb agreement concord. The grammar
component was selected because the type of each composition is different. One of them is an explanation, while the other one is an argumentative kind. Therefore,
the researcher drew a line to connect both by finding the common element present in them, namely Subject-Verb agreement.
3. Observation
