4. Arranging the material to be taught The researcher arranges the material that was be taught to each class by
preparing the lesson plan 5. Implementing the methods Direct Method and Modified Direct Method
through group work both in experimental group 1 and group 2. The experimental group 1 is thought by using Direct Method and the
experimental group 2 is thought by using Modified Direct Method through pictures
6. Presenting the post test to evaluate the result of the experiment This test is given after the experiment to both classes in order to know the
students achievement after they receive the treatment. The researcher asks two raters to score the result
7. Analyzing the data
3.5 Criteria of Good Test
In this research, to prove whether the test has good quality, it must be tried out first. The test can be said having a good quality if it has a good validity,
reliability, level of difficulty, and discrimination power.
1. Validity
In validity concept there are three parts of process, the first is content, the second is construct and the last is face validity, and then the researcher in this
part was discussed only the content of test. The validity of the test is the extent
to which it measures what it is supposed to measure and nothing else Heaton, 1991:159. In order to measure whether the test has a good validity, the
researcher analyzes the test from content, construct, and face validity. Content validity is concerned with whether the test is sufficiently representative and
comprehensive for the test. In the content validity, the materials given are suitable with the curriculum. In this case, the researcher uses the vocabulary that
is supposed to be comprehended by grade VIII students. To fulfill this validity, the researcher should see all the indicators of the instrument and analyze them
whether the measuring instrument has represented the material that was being measured or not. In this research, the researcher was arranged the instrument
based on the material that was be given. If the measuring instrument has
represented all the ideas that connected with the material that was be measured, that measuring instrument has fulfilled the aspect of content validity.Content
validity can also be examined from the table of specification. If the table represents the material that the tester wants to test, it means that it is a valid test
from the point of view Shohamy, 1985: 74. The content validity is constructed by including vocabulary material presented in the training; they are noun, verb,
and adjective. The content of try out test is represented in the table of specification below:
Table 1. Specification of the Try out Test
No Verb Classes
Numbers of Items Percentage
1 Nouns
1,2,3,4,8,12,14,18,20,22,27,36,37,38,39,40 40 2
Verbs 5,7,9,19,21,23,24,25,29,30,31,35
30 3
Adjective 6,10,11,13,15,16,17,26,28,32,33,34
30 Total 100
