The Effect of Star Rewards and Punishments Strategy on Students Mastery Vocabulary

Abstract

This study aimed at finding out whether the used of star rewards and punishments strategy on students’ mastery vocabulary. This research applied experimental research. Population of this research was the second year student of junior high school in SMP Swasta Darussalam Medan at JL. Darussalam No.26 ABC Medan. At academic year 2014-2015 with the total population were 192 students. And the researcher took two classes as the sample. The samples divided into two groups. The first group as experimental that consist of 49 students in class VIII-3 and the second group as control group that consist of 49 students in class VIII-4.The experimental group was taught by using star rewards and punishments and the control group was taught by lecturing method. The instrument of collecting data is multiple choice which consist 20 items. After the data have been collected they were analyzed by using t-test formula. The result of analysis showed that t-observed ( to =20.61) was higher than t-table (ttable=with the level of significant ɑ = 0.05 the value of t-table 1.67 and the degree of freedom (df=96) it showed that t-observed>t-table (20.61>1.67). The result showed that the alternative hypothesis of the study is accepted. It means the result of this research proved that using Star Rewards and Punishments Strategy was significantly more effective to increase the vocabulary than using Lecturing method.