Abstract
This study explored the effect of pictorial freehand sketches on CAD model building for first and second year engineering students. Thirty one students from CGT 163 Graphical Communication and Spatial Analysis course at Purdue University completed the study. Subjects were divided into two groups, one of which was required to use pictorial freehand sketches in the visualization process while the other one was not. Subjects were provided real models of physical objects of different complexity and were asked to model a part that would fit in the original one to form a rectangular prism. Outcomes were then analyzed in terms of time spent on the task, number of steps used during the process, and accuracy of the resulting model. In addition, subjects’ scores from the Purdue Spatial Visualization Test (PSVT) were recorded and used in the study as a measure of visual ability. The results showed no statistically significant effect of sketching on the construction of CAD models. At this point, we are not ready to conclude that pictorial freehand sketching directly affects CAD model construction. Subjects’ visual abilities, on the other hand, had a significant effect on model building.
Date of this Version
11-28-2012
Department
Computer Graphics Technology
Department Head
Dr. Marvin Sarapin
Month of Graduation
December
Year of Graduation
2012
Degree
Master of Science
Head of Graduate Program
Dr. Craig Miller
Advisor 1 or Chair of Committee
Dr. Craig Miller
Committee Member 1
Dr. Patrick Connolly
Committee Member 2
Dr. Steve Visser