Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2009.1256.1262AliS.A. SulaimanN. MustaphaA. MustaphaN. 8200988The use of deep generation with statistical-based surface generation merits from response utterances readily available from corpus. Representation and quality of the instance data are the foremost factors that affect classification accuracy of the statistical-based method. Thus, in classification task, any irrelevant or unreliable tagging of response classes represented will result in low accuracy. This study focused on improving dialogue act classification of a user utterance into a response class by clustering the semantic and pragmatic features extracted from each user utterance. A Decision tree approach is used to classify 64 mixed-initiative, transaction dialogue corpus in theater domain. The experiment shows that by using clustering technique in pre-processing stage for re-tagging response classes, the Decision tree is able to achieve 97.5% recognition accuracy in classification, better than the 81.95% recognition accuracy when using Decision tree alone.]]>Ali, S.A., N. Sulaiman, A. Mustapha and N. Mustapha,20098923928Bar-Or, A., D. Keren, A. Schuster and R. Wolff,20051711381151Belz, A.20071126Castro, M., D. Vilar, P. Aibar and E. Sanchis,2004Vol. 3040,pp: 260-270pp: 260-270Paiva, D.S. and R. Evans,20052005pp: 5865Deelers, S. and S. Auwatanamongkol,200726323328Fodor, P.,20072007pp: 14Hulstijn, J. and A. Van-Hessen,19981998pp: 14Keizer, S. and H. Bunt,20072007pp: 158165Komatani, K., N. Kanda, T. Ogata and H.G. Okuno,20052005pp: 877880Langkilde-Geary, I.,20022002pp: 1724Li, W. and M. Aiken,199828288294Marciniak, T. and M. Strube,20042004pp: 100109Mitchell, T.,1997Mustapha, A., M.N. Sulaiman, R. Mahmod and H. Selamat,20088253258Oh, A.H. and A.I. Rudnicky,200016387407Olguin, S.R.C. and L.A.P. Cortes,20062006pp: 355-365pp: 355-365Quinlan, J.R.,1986181106Reithinger, N. and E. Maier,19951995pp: 116121Stent, A.J.,200216313352Stolcke, A., K. Ries, N. Coccaro, E. Shriberg and R. Bates et al.,200026339373Traum, D.,19971997pp: 169171Varges, S. and M. Purver,20062006pp: 14Walker, M.A., R. Passonneau and J.E. Boland,20012001pp: 515522Yang, F., G. Tur and E. Shriberg,20082008pp: 49414944