The computation model was built on CogSketch, a sketch-understanding system developed in Forbus' laboratory at Northwestern University. Sketching is a natural activity that people do while thinking or trying to communicate an idea, especially when spatial content is involved. Sketching is also heavily used in engineering and geoscience. CogSketch is used to model spatial understanding and reasoning, making it suitable for research based on sketches, but also for testing against a standardized visual intelligence test such as the Raven's Progressive Matrices test.
Northwestern University Application: CogSketch People sketch to work through ideas and to communicate, especially when dealing with spatial matters. Software that could participate in sketching could revolutionize spatial education, and provide a new kind of instrument for cognitive science research, as well as being an important scientific advance in its own right.