@inproceedings{52b2b1b99a65414f84da0012bb8e5d20,

title = "Inferring the context for evaluating physics algebraic equations when the scaffolding is removed",

abstract = "This paper describes our continuing work on enabling a tutor to evaluate algebraic solutions to word problems in physics. Current tutoring systems require students to explicitly define each variable that is used in the algebraic equations. We have developed a constraint propagation based heuristic algorithm that finds the possible dimensions and physics concepts for each variable. In earlier work we developed techniques that worked for a small set of problems and evaluated them on a small number of students. The work described here covers an extension to and evaluation of a much larger class of problems and a larger number of students. The results show that our technique uniquely determines the dimensions of all the variables in 89{\%} of the sets of equations. By asking the student for dimension information about one variable, an additional 3{\%} of the sets can be determined. Thus a physics tutoring system can use this technique to reason about a student's answers even when the scaffolding and context are removed.",

author = "Liew, {C. W.} and Joel Shapiro and Smith, {D. E.}",

year = "2004",

month = "12",

day = "17",

language = "English (US)",

isbn = "1577352017",

series = "Proceedings of the Seventeenth International Florida Artificial Intelligence Research Society Conference, FLAIRS 2004",

pages = "455--459",

editor = "V. Barr and Z. Markov",

booktitle = "Proceedings of the Seventeenth International Florida Artificial Intelligence Research Society Conference, FLAIRS 2004",

note = "Proceedings of the Seventeenth International Florida Artificial Intelligence Research Society Conference, FLAIRS 2004 ; Conference date: 17-05-2004 Through 19-05-2004",

}