CORRELATION OF VOCABULARY MASTERY TOWARDS STUDENTS’ SPEAKING SKILL

Communication is a significant skill for students to be mastered because it is related to their skills in producing sounds and expressing their opinions using linguistics and sociolinguistics competences. To improve speaking skill, the students should have good knowledge and understanding of vocabularies that they could use to build words and sentences based on the language contexts. This research conducted to find out whether there is a correlation between students’ vocabulary mastery and students’ speaking skills, and the method used is descriptive quantitative using the statistic analysis SPSS 20. The participant of this research is ten grade students of SMK MANBAUL KHAIR in the first semester 2019/2020 academic year. The research finds that there is a positive correlation between the students’ vocabulary mastery and students’ speaking skills. Although the correlation is low, calculated r = 0.394, it is still considered that this correlation is positive, that means teachers should give the students related meaningful materials to build their vocabularies and provide the opportunity for the students to practice using their new vocabularies.


I. INTRODUCTION
nglish plays as important role in process of communication and also can accelerate science and technological development of a nation. In Indonesia, English is regarded as a foreign language for many periods of time. It is belived that mastery of a foreign language would give a great benefit to one's personal needs and profesional demands. In order to master a new foreign language, learners should therefore have adequate skills that would be helpful in learning process. Students can learn English not only from text books, lecturers, articles, journals but also from magazines, newspapers, videos, and internets. Most of them are not written and published in English.
Vocabulary is a part important for developing our ability. Basically, in making sentences verbal or non-verbal, we need some vocabularies to improve our language skill, so that other individuals understand what we mean. In learning vocabulary, student can differentiate the structure of it. Such as, verb, adjective, noun, adverb, conjuction, and preposition to arrange into a good sentences through learning vocabulary, and helps students to understand in spoken or written english.
Vocabulary mastery plays a great role in determining the success of foreign language learning. Schmitt (2000:19) points out that one of the key elements in learning a foreign language is mastering the L2 vocabulary. Meaning that without having enough vocabulary, a foreign language learner will have problems in understanding a language and expressing his ideas. Besides, Nation (1990:2) states that learners feel that many of their difficulties in both perceptive and productive language use result from an inadequate vocabulary. Furthermore, he states that the students need a productive knowledge of at least 3000 high frequency.
English words in order to be able to cope with English tasks. It means that if students do not have enough vocabulary will be frustrated as they have to look the dictionary up in the most of time. It is absolutely clear that learners especially senior high students master the vocabulary. E Baker (1995:100) states that most people feel, there is a common sense relationship between vocabulary and comprehension the messages are composed of ideas and the ideas are expressed in words. There are a number of ways how to encourage the student's vocabulary development, but the most important and effective are through in teaching method and student's achievement in speaking skill. By taking extra steps to help the students build their vocabulary while speaking at school, it is important to provide the students with the tools needed for academic and career success.
Words are the tools for thought, many words that students' learning, the more tools they will have to achieve great things. By improving students' vocabulary skills, there is an assumption where a student's success in grade school, high school, college and later in his or her career is dependent almost entirely on vocabulary.
The students in listening, speaking, reading and writing should be followed by vocabulary understanding. The student must add their vocabulary as many as they can. In the other words, it can expand their knowledge in communication. Communication is act or instance of transmiting. Beside that, communication define that is sending a message or an information to another individuals by symbol, signs, or behavior. We need a lot of vocabularies to improve our speaking skills. Speaking needs performance, expression, intonation, stresssing, pronunciation, grammar and confidence to explore the idea or opinion. In speaking ability, the most effective tool for communication in speaking, because it can be comprehended quickly. The most human beings use speaking to express message from a speaker to a hearer in all situation and condition such as relaxes situation where speaking is needed. It is a crucial part of second language learning and teaching. However, today's world requires that the goal of teaching speaking should improve students' communicative skills because students can express themselves and learn how to use a language.
Speaking is used more often and it is more important to make students express their message to show their feeling, ideas, happines, angry and emotion. Systematic and continues instruction must be developed in order to teach and reinforce the bassic attitude skill and abilities of their expression and implement their use in meaningful communicational situations. Speaking scope is limited in grammar, vocabulary, and pronunciation, accuracy because they are more important in speaking
In senior high school, students are required to use and communicate English orally.
However low skill of student's English speaking happens in private senior high school in Jakarta. It is interesting phenomena and encouraging researchers to conduct a study. With regards to the fact above, it is necessary to do a kind of research to find out whether there is significant influence or effects between vocabulary mastery towards student's speaking ability.

A. Vocabulary mastery
According to Allen (2000:856), mastery is skill or knowledge that make one master of a subject. It is someone's skill or knowledge of Vocabulary therefore has an important role to help the students understand the meaning of words.
Refering to concept of mastery, vocabulary mastery is someone's proficiency in using words and their meaning appropriately in language. By reading a text, learners will be accustomed to looking the dictionary up, guessing the words, and using the words in the concept properly. Richards (2002:225) said "Vocabulary is a core componet of language proficiency and provides much of the basis for how well learners speak, listen, read and write". Good mastery of vocabulary helps the learners express their ideas precisely. By having many stocks of words, learners will be able to comprehend the reading materials, catch someone's talk, give a response, speak fluently, and write some kinds of topics. On the contrary, if the learners are unfamiliar with the meaning of the words by those who address them, they will be unable to participate in conversation, ask for the information or express some ideas and thoughts. It can be inferred that vocabulary is a collection of words, which is collected through language, conversation and a dictionary used by people in verbal communication. Vocabulary mastery is some-

YAYASAN AKRAB PEKANBARU
Jurnal AKRAB JUARA Volume 6 Nomor 3 Edisi Agustus 2021 (170-183) one's proficiency in using words and meaning and English language which frequently come up. Besides that, vocabulary is also important in language learning which has to be mastered by students to develop the language skills; especially in reading that students should have adequate vocabulary as a result they can understand the reading materials.

B. Aspect of Vocabulary
Thornbury ( 11. Not all the vocabulary that the learners need can be taught. Learners will need plentiful exposure to talk and text as well as training for self-directed learning.
It can be seen that so many components in mastering vocabulary because it consists of words, which have special features, and when someone only knowing the content words, without knowing the fucntion words, and other components of words, he or she will never understand English sentence in a paragraph, or in a passage. Having lack of vocabulary will make students difficult in expressing their ideas; they will find many difficulties in using language skills. In enriching student's vocabulary therefore the first thing has to do before starting lesson, students are introduced with the new vocabulary in the context of a passage.

C. Principle of teaching vocabulary
In teaching and learning process we can find that vocabulary is a main component in a language. Vocabulary should be taught in context, every student needs many words to converse with another. Griffin Speaking is the most important activity in any language class, not only as a source of information and a pleasurable activity, but also as a means of consolidating and extending one's knowledge of the language. Speaking is an active cognitive process. It is influenced by the speakers' knowledge and experience, spea-king is also interacting with the others. Furthermore, it is one of the most important language skills which should be mastered by the students. To comprehend the speaking materials, having a teaching method and a mastery over vocabulary are two of the important indicators which will influence learner's ability and understanding in speaking skill. By having adequate vocabulary mastery, learners are able to understand the meaning or the message from the authors. Vocabulary can be increased through many ways, such as reading (book, article, novel, newspaper, or magazine) memorizing the words, looking a dictionary up, surfing on the internet, watching western movies or listening to western music.
Vocabulary mastery is the student's ability in finding out the words meaning in a sentence or paragraph, in the content, fuctional words, idioms, and also phrasal verb. The vocabulary mastery can be enriched by giving a test to the students about words implementation, labeling a word to a picture, describing someone or something, finding the synonyms or antonyms from the text or the passage. The researcher assumes that there is closely a significant correlation of vocabulary mastery on students' speaking skill.

III. RESEARCH METHODOLOGY
The reseacher will research at Private suggest that students' vocabulary mastery at the 2,000-word and the 3,000-word levels was correlated to their reading comprehension.
Significant correlation yielded only for the short-answer question, but not for the summary. Pedagogical implications and recommendations for further research are also discussed.

IV. RESULT AND DISCUSSION
The researcher used a set of vocabulary test to collect the data of vocabulary mastery.
The blue print of vocabulary mastery will be sown in the following table: The valid item can be seen in correlated item.

Tabel 2 Reliability Test
The instrument for student's speaking skill is aimed at figuring out the student's ability to communicate in spoken English through answering some questions after having treatment of learning process. Speaking skill should be owned by someone who wants to communicate effectively to process of conveying meaning, expressing idea and feeling through verba utterances at any situation in various context. One of the thoughest challenges of communicate testing has been the construction of practical, reliable and valid test of oral production ability. There are four aspects of speaking skill to be measured in this research. They are Grammatical range and accuracy, Lexical resource, Fluency and coherence (vocabulary), Phonology: intonation, rhythm, pronunciation, discourse prosody.

Tabel 6. Correlation Value
Based on the result of analysis in the table above, it can be seen that there is a correlation between students' vocabulary mastery and students' speaking skills measured using product moment correlation by Pearson. The correlation showed the level of significance (2 tailed) between vocabulary mastery and speaking skills of the students are 0.000 < 0.05. It means that there is a positive correlation between those variables. The value of correlation can be described that there is good correlation between those variables, which means if the students have good vocabulary mastery, they will have good speaking ability and better communication. Although it is found that the calculated r showed 0.394, it means the level of correlation between the variables is low but with confidence (according to the level of correlation by Guilford (1956)), it is still considered that there is positive correlation between the two variables.

Tabel 7. Level of Correlation
Therefore, it is really important to motivate students to build their vocabularies and have great number of vocabularies in order to be able to speak better. The teachers should provide more practice for the students to build their vocabularies by giving them some vocabularies practice such as word building, word search, and others, so the students will get more understanding of the importancy of building their vocabularies. The teacher also should provide the opportunity for the students to practice their English by building a forum class or other practices for the students communicate with their friends and other people.

V. CONCLUSSION
The speaking skill is an important skill for the language learners to be mastered due to its function to convey meaning and express

YAYASAN AKRAB PEKANBARU
Jurnal AKRAB JUARA Volume 6 Nomor 3 Edisi Agustus 2021 (170)(171)(172)(173)(174)(175)(176)(177)(178)(179)(180)(181)(182)(183) ideas and feelings through verbal utterances in various situations and contexts. The learners not only should have broad knowledge to use the language in context according to its structures, but also should understand to explicit instruction in speaking, which generally has to be learned and practiced. To be fluent in speaking, the learners should understand not only the use of grammar, pronunciation, or vocabulary, but also the use of sociolinguistic competence in producing sounds; therefore, the learners should be able to find out the words meaning based on the langauge contexts.
Learners who have an adequate vocabularies will be more able to understand the meaning or the message from the authors. As the result of this research has showed that there is closely a significant and positive correlation of vocabulary mastery on students' speaking skill. It means that teachers should provide materials of learning that can increase the students' vocabularies, give the best techniques for the learners to build their vocabularies, and also let the learners to have lots of opportunity to practice their new vocabularies in expressing their ideas and opinions in speaking.