The Purposes of Reading Reading Comprehension
19
With this second model, hopefully, the research can show the effectiveness of the treatment more accurately.
c. Solomon four-group design
This model adds two groups from the original group in the first model. The treatment is given to one of these new groups too. There is no
pre-test here because it is expected that the last measurement will not be inferred by the pre-test. In other words, the researcher wants to check the
effect of the pretest to the post-test by eliminating the pre-test to one of the groups. The scheme is as follows:
The models of quasi experiment are as follows: a.
One shot case study This experiment is conducted without any control group and without
any pre-test. The scheme is as follows:
With this model, the researcher has a simple purpose that is to know the E
1
: O
1
X O
2
E : O
1
X O
2
P : O
1
O
2
E
1
: O
1
X O
2
C
1
: O
1
O
2
E
2
: X
O
2
E
2
: O
2
X O
20
effect of the treatment given to the group by ignoring the effect of other factors.
b. One group pre-test post-test design
This experiment is conducted to only one group without any control group. This model is more perfect than the first model because it uses pre-
test. So, the effect can be measured more accurately. The scheme is as follows:
c. Posttest only control group design
This model is similar to the last two rows of the Solomon’s model. The use of this model is based on the assumption that both the experimental
and control groups are absolutely equivalent. The scheme is as follows:
In this study, the writer chooses the posttest only control group design to be conducted in investigating whether the Kang Guru Magazine “The Joy’s Club”
can be used to improve reading comprehension of the students of junior school. O
1
X O
2
E : X O C : O
21
CHAPTER III METHOD OF INVESTIGATION
Chapter III presents method of investigation, which consists of research design, population and sample, research procedure, research instrument, and
techniques of data analysis.