Page  144 ï~~COMPUTER PROGRAM FOR A MUSICIANS' PROBLE Richard D. Ashl School of Musi Northwestern Univ( 711 Elgin Roac Evanston, Illinois 602( (708) 491-543: email.0. music.n ABSTRACT: This paper describes a comj Lisp, which seeks to provide a basis for the musician's activity, with an eye to understar employed. musicians The particular activity under cc working with tutorial systen represents connections between musical str used for seeing the ways in which different e to one another and analyzes student's actions typical problem-solving behaviors.

Page  145 ï~~l7. %" Begin Fig urc 1: Scrccn for ania (c listc 6

Page  146 ï~~of the seven primitive actions. For example, if an icon has been clicked, Lispro determines this fact. This inf rules, Which generalizes, mapping a student action ontc are then added to the student transcript, parsing the rela 200=300 in a typical 30 minute working session) iflt( "blocks." These blocks can then be examined for finerc set of rules attempts to take these sequences of blocks solving "plans" or methods which the student is employi Currently, Lispro recognizes two main problem-s alerts the user of the presence of these. The first p backtracking, or "bulldozing." A student working with to locate blocks in the puzzle starting from the beginni systematically to the end. Usually, this is signalled beginning up to a certain point, locating the section wh the music which has been heard, then returning to U further, and continuing in this manner until the entire method, although usable, is not too efficient due to the