Analisis Kesalahan Pelafalan Vowels Mahasiswa Jurusan Tadris Bahasa Inggris IAIN "Smh" Banten

This research is aimed at describing the pronunciation errors committed by the students of English Education Department IAIN Sultan Maulana Hasanuddin Serang Banten. The pronunciation errors in this research only cover one of the English phonemes, that is vowel The data were collected by asking 20 students to read aloud some English texts. The reading activity was recorded by using a handycam.The research result shows that the students committed errors in pronouncing vowels [I, i:, u:, e, a:, ^, Ω, Ɔ:, α, 3:, Ə, à] as much as 1058 errors. These errors are in the form of omission as muse as 12 errors, addition as much as 82, and substitution as much as 964. The most frequent error occurred was in the vowel /Ə/ as much as 316 errors which consisted of 54 errors in the form of addition and 322 errors in the form of substitution.The students' pronunciation errors of vowels may be caused by many factors, such as inteiference from their native/ mother tongue, interference from the target language they are learning, and inteiference from their developmental errors. Key words: vowel, interference, overgeneralizatio