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CHAPTER III RESEARCH METHODOLOGY
This chapter presents place and time of the study, the subject of the study, method of the study, instrument of the research, technique of data collecting and
technique of data analysis.
A. Place and Times of the Study
The  writer  took  place  for  research  at  SMIP  AMEC  Integrated  Islamic Junior High School Al-Makmun Education Center which is located on Jln.Nawi
Malik,  Serua,  Bojongsari,  Depok.  The  Research  was  conducted  for  one  month Since May to June 2015.
B. The Subject of the Study
In  this  research,  the  writer  took  the  population  from  the  Eighth  Grade students  of  SMPIT  AMEC,was  about  123  students,  which  divided  into  four
classes.  The  writer  decides  to  random  sampling  which  was  taken  only  one  class consisting of 30 students  but at times two students were sick and four was absent
so the writer only give 24 instrument of the research questions in  Vlll-A class.
C. Method of the Study
The writer used the descriptive analysis method and uses the procedures of error analysis itself. The method is purposed to analyze problem or case happened
at  the  Eight  Grade  students  of  A  class  .  It  invovles  accumulating,  analyzing  and classifying data with various techniques, also interpreting data. The final step, the
writer  has  conclude  the  result  of  research.  The  study  is  also  based  on  field research.  Through  field  research  ,  the  writer  explains  the  tenses  through  Modal
Auxilaries  in  the  class,  examines  the  Eight  Grade  students  of  SMPIT  AMEC  by doing the test to get some data from the students. It also supported by some books
are related to the topic.
D. Instrument of the Research
To get the data, the writer gave a test to the Eight Grade Students of SMPIT AMEC, at VIII- A class. The test consist of 24 items focused on Modal Auxilaries
Can and Could.
E. Technique of Data Collecting
There are two techniques of collecting data applied in this study: 1.
The writer used the test. He gave 24 items of sentences completion test to the Eight Grade Students of SMPIT AMEC . the test were about modal auxilaries
Can  and  Could  .  before  students  doing  the  test,  the  writer  gave  a  little explanation about those modal auxilaries.
2. The writer also used interview . the interview purposes to find what source of
the reason why students  face difficulties in using modal and made an error in using modals especially modal Can and Could. One for teacher and more is for
students.
F. Technique of Data Analysis
After  collecting  data  from  test  and  interview  ,  the  writer  analyze  the students’ error by focusing thier grammatical errors in using modal auxilaries Can
and Could
from the students’ answer sheet.
The  precentage  of  the  errors  will  be  presented  based  on  the  terms  of descriptive  analysis  technique.  The  writer  applied  the  following  formula  to
calculate the precentage of students’ grammatical error in using modal auxilaries Can and Could.
The formula as follow :
P : Percentage F : Frequency of errors
N : Number of observed sample
1
1
Anas Sudjiono, Pengantar Statistik Pendidikan , Jakarta : PT Raja Grafindo Persada , 2005,  p. 43.
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CHAPTER IV FINDINGS AND INTERPRETATION
A. FINDING
1. Data Description
The researcher conducted a test to get the data to the Eight Grade Students of
SMPIT  AMEC
Integrated  Islamic  Junior  High  School  Al-Makmun  Education Center,  Serua,  Bojongsari  Depok.  The  researcher  has  given  the  test  about
Grammar Modal Auxilaries to 30 students of
SMPIT AMEC
on 28 of May 2015. Actually the number of the students in Vlll-A class is 30, but at that time two of
them were sick and four of them were absent. So, the samples of this research are 24  students.  The  test  consists  of  24  items  which  only  focus  on  Grammar  Modal
Auxilaries Can and Could.  After conducting the test, the researcher analyzed the data  from  the  students’  test  to  find  out  the  errors  that  students  made  in  hisher
answer by circling each erroneous item. After identifying the data, the researcher analyzed  the  errors  and  classified  them  based  on  the  Surface  Taxonomy
Categories  to  know  whether  these  errors  involve  in  omission,  addition, misformation, or misordering.
The  students  made  errors  in  four  types;  Omission,  Addition,  Misformation, and  Misordering.  The  total  of  all  errors  is  237  errors  made  in  using  Modal  Can
and  Could  from  24  students.  There  are  34  errors  in  Omission,  40  errors  in Addition, 131 errors in Misformation, and 32 errors in Misordering.
A. The Result of Interview
This  technique  is  used  to  collect  the  data  and  that  can  be  used  as supporting data. The researcher did interview after giving the test to the students.
First,  researcher  interviewed  the  teacher  after  researcher  observed  him  in delivering his teaching. Researcher conducted it on Wednesday, 28 of Mei 2015 at
09.00 – 10.00a.m. The researcher asked ten 10 questions. The research interview
guide  for  teacher  in  appendix  1A  and appendix  1B  to  the  teacher  answer  in
interview  besides  interviewing  the  teacher,  researcher  also  interviewed  the students which conducted after they did the test. Ten 10 questions are given. The