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. Author manuscript; available in PMC: 2013 Apr 21.
Published in final edited form as: Exp Brain Res. 2009 Dec 24;202(1):189–202. doi: 10.1007/s00221-009-2126-5

Fig. 3.

Fig. 3

Endpoint error, endpoint variance, and force trajectory SD for the fast and slow contractions as a function of target force. Each data point corresponds to the mean ± SE for 1 block of 15 trials at each target force for fast (filled circles) and slow (open circles) contractions. a Endpoint error increased with target force for the fast contractions, but not the slow contractions. A significant contraction speed × force interaction (P = 0.001) indicated that endpoint error was greater for fast contractions compared with slow contractions at the 60 and 80% target forces. b Endpoint variance was greater at the 20% target force compared with all the other target forces and did not differ across the two contraction speeds. c Force trajectory SD increased with target force for both contraction speeds and was greater for the slow contractions compared with the fast contractions (P < 0.001)