43 The interview was used in collecting the data from the teacher. The teacher was
asked about their opinions of the activity process including problems faced in the use of song in the teaching and learning vocabulary. Meanwhile, the interview
grills used by the researcher were as follows:
Table 5 Specification of interview
Components of Interview No. Item
Total Item
The researcher asked teacher about the teacher’s problem in teaching vocabulary
1,2,3 3
The researcher asked teacher about vocabulary of students
4 1
The researcher asked teacher about the students’ participation while teaching learning process
5 1
The researcher asked teacher about song 6,7,8,9,10
5
D. Research Procedure
The procedure of research was used as follows: 1. The researcher found the population and the sample. The researcher chose the
school and the sample of the research. 2. The researcher came to the class with the teacher in order to make observation
when teaching learning process was conducted. 3. After teaching and learning process finished by the teacher, the researcher gave
the questionnaire to the students.
44 4. The researcher interviewed the teacher to know her opinion referring to the
material and the activity. 5. Analysing the data and make the report.
E. Trustworthiness of the Data
Trustworthiness is demonstaration that the evidence for the result reported is sound and when the argument made based on the result is strong. According to
Sugiono trustworthiness has 4 criteria, such as: credibility internal validity, transferability external validity, dependability realibility and confirmability
objectivity.
62
1. Credibility Internal Validity In this verification there are six kinds to verify credibility the result data of
qualitative research. Such as: extension observation, upgrading diligence, triangulations, discussion with friend, analysis negative case and member check.
a. Extension Observation To increase the credibility of the reseacrh, the researcher conducts extension
observation. It means the resarcher observe two times to the object of the research in order to the researcher and informant nearer and to be rapport.
62
Sugiono,Op.Cit,p.366
45 Rapport is a relationship of mutual trust and emotional affinity between two or
more people. b. Upgrading Diligence
Upgrading diligence is conducting the observation more accurately and continously. Therefore, the researcher can describe the data accurate and systemetic about the
object of the research. c. Triangulation
Triangulation is qualitative cross-validation. It assesses the sufficiency of the data according to the convergence of multiple data sources or multiple data
collection procedures Therefore, there are triangulation sources, triangulation technique and triangulation time. triangulation sources are from teacher, friend
and parents. Triangulation technique are observation, interview and questionnaire. triangulation time are morning, daylight, and afternoon.
d. Analysis Negative Case Analysis negative case is finding different data from the data has been found.
If the data there is no different from the data that has been found, therefore the data is reliable data.
e. Using References Using references is there are supporters to prove the data that has been found.
Such as: photos, authentic document, record tools and camera.
46 2. Transferability External Validity
Transferability external validity determines validity of degree that the result of research can be applied to population where sanple taken. In order to the the other
people can understand the result of qualitative research, the researcher must make report clearm systematic, detail and reliable. If the reader get illustration clearly,
so, the result of the research is transferability external validity. 3. Dependability Realibility
Dependability realibility is conducted by audit to the whole process of research. 4. Confirmability Objectivity
Confirmability objectivity is quite same with dependability realibility, so the verivication can be conducted similarly.
63
In addition, the method commonly used to improve the reliability and validity in qualitative research is triangulation,
triangulation is a merger of two or more methods in collecting the data. Usefulness of triangulation is to enrich the data by using two or more methods in collecting
the data, eventually makes more accurate conclusion. According to Cohen and Manion in Setiyadi, there are several kinds of triangulation as follows:
63
Sugiono, ibid. p. 368-378
47 a. Time Triangulation
1 Cross-sectional triangulation is the data collection implemented in the same time to different groups but in the longitudinal, data collection is
carried out from the same group with different time. 2 Longitudinal triangulation is the data collected from the same group at
different times. b. Place triangulation
For more accurate data collection, place triangulation purpose is to be able to use different places for similar data.
c. Theory triangulation Researcher collects the data based on different theories.
d. Method triangulation Researcher uses different methods for collecting similar data.
e. Researcher triangulation In collecting for the same or similar data, it can be done by several
researchers.
64
Based on the statement above in this research, the researcher used method triangulation because in this research, researcher used different kind of method to
collect the data. The methods are observation, questionnaire, and interview. The uses of triangulation are to enrich the data and make more accurate conclusion. So
64
Ibid, p. 31-32.
48 in qualitative research the triangulation is important because if the researcher
wants to get the conclusion, the researcher should have strong data.
F. Data Analysis
