Fig. 4

Validity: relation between Tablet and Dextrain task variables quantifying dexterity. A Dextrain device with one piston (force sensor) per finger. B Correlation between RT during single-finger tapping using Dextrain and the average RT in the tablet finger recognition task (FiRec): N = 43; r = 0.47, p = 0.002. C Correlation between Dextrain RT and tablet RT for two-finger taps during multi-finger tapping (MFTap): N = 41; r = 0.46, p = 0.002. D Correlation between Dextrain RT and tablet RT for single-finger taps during multi-finger tapping: N = 41; r = 0.49, p = 0.001. N: number of subjects, r: Pearson’s correlation coefficient