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The objective of this research is to find out whether or not the use of anagram game effective to improve the students’ vocabulary mastery. The researcher conducted a pre-experimental group design. The population of this research is the seventh-grade students of SMPN 1 Diwek Jombang in academic year 2023-2024. The total number of the first-class is 256 students. The sample in this study was class VII-A SMPN 1 Diwek Jombang, totaling 32 students. Based on the data normality test that has been carried out by the researcher, it shows that sig. 2-tailed in pre-test is 0.200 and post-test is 0.100 meaning that the data is normally distributed, the it will be continued with a simple paired t-test. Based on the testing of hypothesis terms, if the score of t is sig. <0.05, H1 is accepted and H0 is rejected. On the simple paired t-test calculation, the data shows sig. (2-tail) 0.000. the data is smaller than 0.05, meaning that H0 is rejected and H1 is accepted.
Lailiyah et al. (2024) studied this question.