. Author manuscript; available in PMC: 2013 Jan 1.

Published in final edited form as: Behav Brain Res. 2011 Sep 16;226(1):211–217. doi: 10.1016/j.bbr.2011.09.018

Table 1.

Constant isometric force production variables describing dominant hand performance across the three conditions. The dominant hand was most accurate (normalized mean force) and demonstrated the least variability (RMSE) during the unimanual condition. The force output timecourse was significantly correlated between the two hands during the bimanual simultaneous condition, but not during the bimanual independent condition.

Force Condition	Normalized Mean Force (%)	Variability (RMSE)	B/w Hand Correlations (r)
Unimanual	93.7 ± 1.5^a	0.031 ± 0.004^a	-
Bim. Simultaneous	90.9 ± 2.0^a	0.048 ± 0.005^b	0.69^*
Bim. Independent	74.2 ± 3.4^b	0.088 ± 0.008^c	0.34

Values are mean ± standard deviation. Bim. = bimanual; B/w = between. The same letter within each column indicates metrics of force performance that were not significantly different from each other.

P < 0.01.