Virtual Sectioning and Haptic Exploration of Volumetric Shapes in the Absence of Visual Feedback

Table 2

Confusion matrix of recognition and identification (%) of virtual shapes in the parallel scanning mode at the playback velocity of the virtual trajectory of 28 mm/s, averaged over all participants.

Test objects	Cylinder	2 Cylinders	Trapez. prism	2 Trap. prisms	2 Balls	A ball	2 Hemisph.	Half ball	Torus	Ripples
Cylinder	98.66				0.67	0.67
2 Cylinders		97.99		0.67	0.67		0.67
Trapez. prism	0.67		98.66			0.67
2 Trap. prisms		0.67		97.99			1.34
2 Balls					98.66		0.67	0.67
A ball	0.67		0.67			96.65	0.67	1.34
2 Hemispheres		0.67		0.67	1.34		97.32
A half ball					0.67	3.35		95.98
Torus				0.67					99.33
Ripples										100