Abstract This paper introduces theoretical results of research oriented on development object-oriented models of filter systems of attention. The diagrammatical language UML is used as a means of modeling of attentional systems. Two filter- oriented hypothesis of focused attention offered by Broadbent and Treisman were chosen as prototypes. The paper includes: UML model of the structure of information in the sensory system, the classification of existing models of attention, and two UML models of the phenomenon of attention based on Broadbent's and Treisman’s hypothesis respectively. The study revealed that from the point of view of OO modeling, the model based on Broadbent’s hypothesis can be considered as a basic class, whereas the model based on Treisman’s hypothesis is its enhancement. Both UML models were used to explain results of some key experiments on dichotic listening tasks.

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[15] Wagman M., Cognitive Psychology and Artificial Intelligence: Theory and Research in Cognitive Science, Praeger Publishers, Westport, Connecticut, 1993. Igor Chimir is a professor of computer science at the Cherkassy Academy of Management, Ukraine. He has been involved in cognitive science research for more than 15 years and has particular interests in the subject-independent theory of computer and human dialogue, intelligent tutoring systems, and in object-oriented modeling of cognitive processes. He has published more than 90 technical papers and is the author of several textbooks. His current activities focus on investigating the applicability of modern software engineering approaches to the area of cognitive psychology. 74 The International Arab Journal of Information Technology, Vol. 2, No. 1, January 2005 Waheeb Abu-Dawwas is an assistant professor at the Department of Computer Science, Al-Zaytoonah University, Jordan. He obtained his PhD from the Ukrainian National Academy of Science, Ukraine, in 1999. His research interests include dialogue process modeling and the development of personalized computer educational systems. He has published many original contributions in the field of dialogue-oriented tutoring systems, personalized tutoring systems, and cognitive systems. Raed Alqawasmi is a 3rd year post- graduate student at Odessa State Environmental University, Ukraine. In 2001, he graduated from Odessa National Polytechnic University, Ukraine and obtained MSc Diploma in intelligent computer systems and networking. At the moment, he is on a final stage of completion his PhD thesis. He is an author of five scientific publications in Russian and English.