41 W : Treatment in teaching pronunciation using Fidel Charts,
X : Treatment in teaching pronunciation using ALM, Y : Treatment in teaching pronunciation using Songs,
O2 : Students‟ ability in vowel pronunciation after getting treatment
using Fidel Charts, O4
: Students‟ ability in vowel pronunciation after getting treatment using Audio lingual Method
O6 : Students‟ ability in vowel pronunciation after getting treatment
using Songs
3.2 Subject of the Study
The subject of the study is the eighth grade students of SMPN 32 Semarang in the academic year 20142015.
3.2.1 Population
Population is one of the most important things to conduct a research. According to Sugiyono 2014 population is an object or subject with certain characteristics and
qualities, which have been determined by the researcher to be studied p.117. In hand out of Introduction to Linguistic Research, Saleh 2005, cited
from Sta llone 2003: 5, states that “ɑ population is a group of individuals that
comprise the same certain characteristics that can provide information to answer research question”.
Best 1981:8 states that population is any group of individuals that have one or more characteristics in common that are interesting to the researcher. In
42 addition, according to Arikunto 2010: 130,
“ɑ population is the entire subject in a research. It is clear that population are play important role for research. If there
is no population, there w ill be no sample for research.”
Based on the definitions above, it implies that population is a group of object with a certain characteristics that can provide information that is related to
research. The population used as the subject in this research is the students of the eighth grade of SMPN 32 Semarang in the academic year 20142015. There were
eight classes overall.
3.2.2 Sample
In conducting research, it is difficult to make all of the classes to be observed. Therefore, we should conclude the sample of population. Tuckman in Saleh
2005 states that “A sample is a representative group from a population to serve as respondents.” ɑccording to ɒest 1981, a sample is a small proportion of a
population selected for observation and analysis p. 8. From the definition above, I conclude that the sample is a small part of
population, which are selected for research. The samples of this research are class 8C, 8D, and 8E. For experimental class I used 8C and for the control class I used
8D and 8E. Both of 8D and 8E are given treatment too. 8C is given treatment using Audio Lingual Method. 8D is given treatment using Songs, and the last, 8E
using Fidel Chart.
43
3.3 Sampling Technique
