Research Article

PaperCAD: A System for Interrogating CAD Drawings Using Small Mobile Computing Devices Combined with Interactive Paper

Table 12

Perceived ease of drawing correctly recognized objects and equations. 10 = easy; 1 = hard.

ā€‰ Mean Std. dev.

Extension lines 9.2 0.8
Arrows 9.6 0.7
Area tracing 9.8 0.4
Labels 9.1 1.7
Equations 8.3 1.7