Length and Roughness Perception in a Moving-Plateau Touch Display

Table 1

Theoretically expected length 𝐿_𝑒 (mm), difference of 𝐿_𝑒 from original length (40 mm), and its ratio 𝑋 to original according to velocity ratio 𝛼.

Velocity ratio 𝛼	−0.67	−0.25	0.00	0.20	0.50
Expected length 𝐿𝑒 (mm)	24	32	40	50	80
Difference of 𝐿𝑒 from original length (mm)	−16	−8	0	+10	+40
Ratio to original 𝑋	0.60	0.80	1.00	1.25	2.00