Table 1.

Physiology and psychophysics, mean ± SD

Test	Mean no. of downward scanning movements/stimulus	Mean peak velocity mm/s	Total contact time during 80 s	% correct
Roughness (n = 10)	2.5  ±  0.8	92  ±  36	27.6  ±  13	81.6  ±  12.4
Length (n = 10)	2.7  ±  0.8	113  ±  47	20.9  ±  13	73.6  ±  11.1
Motor control (n = 10)	2.9  ±  0.4	136  ±  78
Shape discrimination (n = 9)			30.5  ±  6.2	72.1  ±  11.6