•Intaraprasert (2004,p.9) emphasises in his study that the main goals of vocabulary learning are: 1) to discover the meanings of a new words; 2) to retain the knowledge of newly-learned words; and 3) to expand the knowledge of English vocabulary.
•Salazar (n.d.,p.2) proposes that the purpose of vocabulary teaching and learning is to make students become independent readers. This means that students need to connect words to existing knowledge and use them in listening, reading, speaking and writing.