An Analysis Of Error Made By The Third Semester Udents On Debate In Speaking Class At Muhammadiyah University Of Surakarta

This research describes the types of error in speaking class on debate at Muhammadiyah University of Surakarta, explain the causes of error, calculate the frequencies and dominants of error, and show the sources of error. The type of this research is descriptive qualitative.The data are from utterances containing speech errors by the third semester students at Muha mmadiyah University of Surakarta. The researcher uses observation t o collect the data. There are 56 data containing of errors. In this research, the researcher uses Clark and Clark (1977) , Taylor (1990) and Kess (1999) theory to analyze the errors. The researcher finds the errors and divides into three classification. There are speech error,lexical error and grammatical error. In speech errors divide into nine type are filled pause (14,29%), repeat (19,64 %), correction (3,57%), interjection (1,79%), stutter (1,79 %),and slip of tongue (10,71 %). Lexical error is wrong choice of word (8,93 %). Grammatical errors divide into ten type are omis sion auxiliary in question (5,36%), omission of to be (14,29 % ), addition of to be/ v erb (5,36 %), omission of “do” in negative sentence (5,36 %), addition of preposition (1,79 %), and wrong choice of verb (5,36 %). From the frequency of error, it can be seen th at the dominant of error is repeat (19,64 %). The causes of error are L1 interferenc e and developmental error. The sources of error are cognitive reason, psychological or affective reason and social reason. Keywords : Speech Errors, Causes of Error, Frequency and Dominant of Error, Sources of Erro