PerSketchTivity: Recognition System and Progressive Learning Analysis

PerSketchTivity is a sketch-based tutoring system for design sketching that allows students to hone their skills in design sketching and self-regulated learning through real-time feedback. Students learn design-sketching fundamentals through drawing exercises of reference shapes starting from basic to complex shapes in all dimensions and subsequently receive real-time feedback assessing their performance. PerSketchTivity consists of a recognition system that evaluates the correctness of a student's sketch and provides real-time feedback, evaluating the sketch based on error (accuracy), smoothness, and speed. The focus of this thesis is to evaluate the performance of the system in terms of the recognition accuracy (does the system correctly understand what the student intended to draw) as well as the educational impact on the sketching abilities of the students practicing with this system. Each student's increase in sketching ability is measured in terms of the accuracy, smoothness, and the speed at which the strokes. Data analysis comparing the early to late sketches showed a statistically significant increase in sketching ability