Research Hypothesis THEORETICAL FRAMEWORK
choices that was examined there are 32 thirty two questions that was valid siginifikansangat signifikan through ANATES software. Instrument that was
valid are 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 18, 20, 22, 23, 24, 25, 27, 28, 30, 31, 32, 33, 36, 37, 38, 40, 41, 44, and 45. While the instrument that was not valid
NANminus are 1, 13, 16, 17, 19, 21, 26, 29, 33, 34, 39, 42, and 43. After the writer found out the valid questions, then the writer gave pre-test.
The test is objective test which contains 30 thirty multiple choices questions for students in experiment and control class. Then, the writer gave post-test; it was
given after the writer taught English vocabulary by using demonstration technique in experiment class and without using demonstration in control class. The post-
test was also given that contains 30 thirty multiple choices questions to both of class. The writer gave all questions of multiple choices based on material of
vocabulary at seventh grade and the result of pre-test and post-test were collected and compared. The tests were used as a data, to find out the effectiveness
demonstration techniques toward the students’ vocabulary at experiment class.