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. Author manuscript; available in PMC: 2009 Apr 1.
Published in final edited form as: Motor Control. 2008 Apr;12(2):151–172. doi: 10.1123/mcj.12.2.151

Table 2. Effective target width.

Group averages and standard deviations of effective target width data are shown for all force production amplitudes (A) and indices of difficulty (ID). UP refers to force increase half-cycles and DOWN refers to force decrease half-cycles. Abbreviations are the same as in Table 1. Effective target width values are presented in % MVC

A = 10 % MVC A = 20 % MVC
ID 1.5 2 2.5 3 3.5 4 ID 1.5 2 2.5 3 3.5 4
UP I 0.033
± 0.003		 0.030
± 0.002		 0.023
± 0.002		 0.018
± 0.002		 0.018
± 0.002		 0.013
± 0.001		 UP I 0.067
± 0.007		 0.055
± 0.007		 0.050
± 0.005		 0.040
± 0.003		 0.033
± 0.003		 0.026
± 0.001
M 0.034
± 0.004		 0.030
± 0.004		 0.028
± 0.002		 0.026
± 0.002		 0.019
± 0.002		 0.013
± 0.001		 M 0.062
± 0.008		 0.060
± 0.008		 0.0054
± 0.008		 0.040
± 0.0003		 0.032
± 0.003		 0.035
± 0.010
R 0.041
± 0.005		 0.035
± 0.002		 0.026
± 0.002		 0.023
± 0.001		 0.030
± 0.012		 0.015
± 0.001		 R 0.073
± 0.007		 0.060
± 0.003		 0.054
± 0.004		 0.041
± 0.003		 0.046
± 0.008		 0.027
± 0.002
L 0.046
± 0.003		 0.038
± 0.002		 0.032
± 0.003		 0.021
± 0.001		 0.020
± 0.002		 0.015
± 0.001		 L 0.111
± 0.021		 0.066
± 0.007		 0.055
± 0.006		 0.051
± 0.013		 0,039
± 0.001		 0.045
± 0.020
M_L 0.039
± 0.005		 0.032
± 0.003		 0.029
± 0.002		 0.023
± 0.002		 0.018
± 0.001		 0.014
± 0.002		 M_L 0.064
± 0.007		 0.060
± 0.006		 0.048
± 0.004		 0.045
± 0.005		 0.034
± 0.004		 0.027
± 0.001
A = 10 % MVC A = 20 % MVC
ID 1.5 2 2.5 3 3.5 4 ID 1.5 2 2.5 3 3.5 4
DOWN I 0.032
± 0.003		 0.033
± 0.003		 0.024
± 0.003		 0.023
± 0.002		 0.019
± 0.001		 0.013
± 0.001		 DOWN I 0.059
± 0.006		 0.045
± 0.005		 0.045
± 0.009		 0.034
± 0.004		 0.029
± 0.004		 0.024
± 0.001
M 0.032
± 0.002		 0.032
± 0.002		 0.027
± 0.004		 0.026
± 0.003		 0.018
± 0.001		 0.014
± 0.001		 M 0.051
± 0.007		 0.061
± 0.008		 0.044
± 0.004		 0.040
± 0.004		 0.030
± 0.003		 0.026
± 0.003
R 0.037
± 0.004		 0.044
± 0.003		 0.029
± 0.002		 0.022
± 0.001		 0.017
± 0.001		 0.014
± 0.001		 R 0.056
± 0.005		 0.048
± 0.004		 0.041
± 0.005		 0.041
± 0.005		 0.0031
± 0.002		 0.025
± 0.002
L 0.041
± 0.002		 0.031
± 0.004		 0.026
± 0.004		 0.022
± 0.002		 0.020
± 0.002		 0.014
± 0.001		 L 0.064
± 0.006		 0.049
± 0.007		 0.049
± 0.005		 0.032
± 0.003		 0.030
± 0.006		 0.023
± 0.001
M_L 0.040
± 0.003		 0.029
± 0.002		 0.029
± 0.002		 0.025
± 0.001		 0.017
± 0.002		 0.013
± 0.001		 M_L 0.059
± 0.004		 0.062
± 0.006		 0.060
± 0.006		 0.043
± 0.005		 0.036
± 0.003		 0.028
± 0.001
A = 10 % MVC A = 20 % MVC
ID 1.5 2 2.5 3 3.5 4 ID 1.5 2 2.5 3 3.5 4
UP I_R 0.033
± 0.003		 0.030
± 0.002		 0.023
± 0.002		 0.018
± 0.002		 0.018
± 0.002		 0.013
± 0.001		 UP I_R 0.067
± 0.007		 0.055
± 0.007		 0.050
± 0.005		 0.040
± 0.003		 0.033
± 0.003		 0.026
± 0.001
IM_R 0.030
± 0.002		 0.033
± 0.005		 0.027
± 0.002		 0.021
± 0.002		 0.017
± 0.001		 0.017
± 0.004		 IM_R 0.056
± 0.005		 0.054
± 0.005		 0.048
± 0.004		 0.037
± 0.004		 0.034
± 0.003		 0.026
± 0.003
IM_RL 0.034
± 0.004		 0.028
± 0.003		 0.027
± 0.003		 0.017
± 0.003		 0.017
± 0.002		 0.015
± 0.001		 IM_RL 0.058
± 0.003		 0.067
± 0.008		 0.040
± 0.007		 0.039
± 0.004		 0.033
± 0.004		 0.025
± 0.001
IMR_R 0.039
± 0.004		 0.030
± 0.002		 0.024
± 0.001		 0.024
± 0.002		 0.017
± 0.002		 0.013
± 0.001		 IMR_R 0.066
± 0.007		 0.051
± 0.005		 0.043
± 0.004		 0.040
± 0.005		 0.033
± 0.002		 0.026
± 0.002
IMRL_R 0.033
± 0.002		 0.027
± 0.003		 0.027
± 0.002		 0.024
± 0.002		 0.021
± 0.002		 0.014
± 0.001		 IMRL_R 0.067
± 0.010		 0.050
± 0.005		 0.047
± 0.007		 0.043
± 0.003		 0.032
± 0.003		 0.023
± 0.001
A = 10 % MVC A = 20 % MVC
ID 1.5 2 2.5 3 3.5 4 ID 1.5 2 2.5 3 3.5 4
DOWN I_R 0.032
± 0.003		 0.033
± 0.003		 0.024
± 0.003		 0.023
± 0.002		 0.019
± 0.001		 0.013
± 0.001		 DOWN I_R 0.059
± 0.008		 0.045
± 0.006		 0.045
± 0.009		 0.034
± 0.004		 0.029
± 0.004		 0.024
± 0.001
IM_R 0.034
± 0.005		 0.030
± 0.003		 0.028
± 0.002		 0.023
± 0.002		 0.022
± 0.003		 0.014
± 0.003		 IM_R 0.054
± 0.007		 0.049
± 0.004		 0.047
± 0.004		 0.036
± 0.004		 0.029
± 0.002		 0.025
± 0.002
IM_RL 0.030
± 0.003		 0.025
± 0.002		 0.023
± 0.003		 0.022
± 0.001		 0.020
± 0.002		 0.012
± 0.001		 IM_RL 0.043
± 0.004		 0.048
± 0.005		 0.043
± 0.006		 0.036
± 0.004		 0.031
± 0.002		 0.028
± 0.002
IMR_R 0.037
± 0.003		 0.033
± 0.003		 0.025
± 0.002		 0.020
± 0.002		 0.016
± 0.001		 0.016
± 0.003		 IMR_R 0.039
± 0.003		 0.042
± 0.004		 0.037
± 0.004		 0.038
± 0.002		 0.029
± 0.003		 0.021
± 0.002
IMRL_R 0.033
± 0.003		 0.028
± 0.0003		 0.026
± 0.003		 0.024
± 0.004		 0.019
± 0.001		 0.013
± 0.001		 IMRL_R 0.041
± 0.003		 0.036
± 0.004		 0.037
± 0.003		 0.039
± 0.003		 0.029
± 0.003		 0.023
± 0.003