%A 1823042017 MARDHIYATI AMBAR SARI %T COMBINING MORPHEMIC ANALYSIS AND VOCABULARY SELF-COLLECTION STRATEGY (VSS) IN TEACHING AND LEARNING TO IMPROVE STUDENTS'VOCABULARY MASTERY %X The research aims to determine whether there is a significant difference in students? vocabulary mastery after being taught by combining morphemic analysis and vocabulary self-collection strategy (VSS) and original morphemic analysis and to determine the students? problems in learning vocabulary. The subject of this research was the 8th grade students of SMPN Satu Atap 3 Sidomulyo. A mixed method was used in this research; the quantitative study was for vocabulary tests, while the qualitative study was for an open-ended questionnaire. Independent group t-test in SPSS (Statistical Program for Social Science) was used to analyze the data of the vocabulary test, whereas descriptive analysis was used to analyze the questionnaire results. The result showed a significant difference in students? vocabulary mastery after being taught through combining morphemic analysis and vocabulary self-collection strategy (VSS) and original morphemic analysis because the value of sig (2-tailed) was 0.000. The morphemic analysis combined with vocabulary self-collection strategy (VSS) was better than the original morphemic analysis to improve students? vocabulary mastery since the mean of gain in the experimental class was higher than in the control class. Then, the adjective was the word class that improved significantly in the control class. Meanwhile, adjectives and adverbs were the word classes that improved significantly in the experimental class. For the second research question, the result showed that problems in the learning process came from spelling the word, pronouncing the vocabulary, using grammar in making sentences, and finding the meaning. From the research, it could be concluded that using morphemic analysis and vocabulary self-collection strategy (VSS) had more advantages in overcoming students? learning problems and improving students? vocabulary mastery. Keywords : Vocabulary mastery, morphemic analysis, vocabulary self-collection, students? problems %D 2022 %I UNIVERSITAS LAMPUNG %L eprints63283