This project was made possible in part by an IWU Mellon Center Instructional Technology Grant in support of IWINK/The SHELLEY RESEARCH GROUP. I would like to extend a special thanks to The SHELLEY RESEARCH GROUP, and to the faculty members of my research hearing committee: Dr. Susan Anderson-Freed, Dr. Johnna Shapiro, Dr. Zhenguang Gao and especially Dr. Lionel Shapiro for all their advice and support during the course of this research.

(added March, 2000) I would also like to thank Dr. David Anderson for expressing interest in my work, and for offering a vehicle to advance this paper.

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