CHAPTER III METHOD OF INVESTIGATION
In chapter III provides the description of methodology used in conducting the research. This chapter consists of some sub-sections, there are research design,
population, sample and sampling technique, research variables, experimental design, instruments for collecting data, and procedure of collecting data.
3.8 Research Design
There are some designs in conducting a research. In this research, I used quantitative method. Quantitative method is a numerical method of describing
observation of material characteristics. Here, statistical analysis is used to calculate numeral data and to analyze the data by the use of correlation analysis.
The method of this research is experimental. According to Brown 1988:3 “experimental studies is a whole range of different possible studies that
investigate t he language behavior of groups under controlled conditions.” The
other definition is stated by Key 1997 which is “an experimental research is an attempt by researcher to maintain control over all factors that may affect to
determine or predict what may o ccur”
http:www.okstate.edu .
3.9 Population
Tuckman 1978:227 states that “population is the establishment of boundary conditions that specify who shall be included in or excluded from the population.
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The population or target group used in a questionnaire or interview study is that group about which the researcher is interested in gaining information and drawing
conclusion.” The population of this study was the eight grade students of SMP Negeri 1
Pati in the academic year 20112012. There were two classes of it. On the average, each class consisted of 28 students, so all students of the eight grade students were
56. The reason for choosing the eight grade students as population in this
study were based on these considerations, first the students met requirement to be used as the population of the study. Then it was assumed that they have the
reading skill which was given in the seven grade students. And the last, I tried to apply the visualization in Desuggestopedia teaching method to improve the
students‟ reading comprehension.
3.10 Sample and Sampling Technique
Tuckman 1978:231 states that “the primary issue in choosing a sample size is that it is sufficient to assure the researcher that the sample will be representative
of the population from which it is done. While the researcher can never be certain of this representativeness unless the entire population is tested, he or she can
establish that the sample is representative of the population on critical parameters at an acceptable level of probability.”
I took VIII-A and VIII-B as the samples of the study. The technique of sampling which I used in this study was random sampling. All the eighth classes
of SMP Negeri 1 Pati had the same chance become the samples of the study. Then I took three classes randomly, namely class VIII-A, VIII-B, and VIII-G. I took
class VIII-A as the experimental class, class VIII-B as the control class and class VIII-G as the try-out class.
3.11 Research Variables
Kategori