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Table 4 Principal component loadings for KINARM behavioral battery

From: Using principal component analysis to reduce complex datasets produced by robotic technology in healthy participants

Task KINARM Items Component Loadings
1 2 3 4 5
Arm Position Matching Absolute Error X 0.870 0.210 − 0.040   
Absolute Error Y 0.320 0.400 − 0.230   
Absolute Error XY 0.910 0.250 −0.100   
Variability X 0.260 0.810 −0.130   
Variability Y 0.140 0.750 −0.060   
Variability XY 0.270 0.860 −0.140   
Contraction Expansion Ratio X −0.120 −0.040 0.890   
Contraction Expansion Ratio Y 0.020 − 0.140 0.800   
Contraction Expansion Ratio XY −0.060 − 0.050 0.990   
Shift X −0.550 0.580 −0.070   
Shift Y 0.250 −0.580 −0.070   
Shift XY 0.870 −0.030 − 0.040   
Ball on Bar Targets completed 0.997 −0.146 0.001   
Mean movement time −0.965 0.066 −0.037   
Mean ball speed 0.942 0.083 0.029   
Mean right hand speed 0.913 0.164 −0.017   
Mean left hand speed 0.956 0.045 0.020   
Right hand speed maxima 0.054 −0.012 0.950   
Left hand speed maxima 0.175 −0.069 0.766   
Mean bar angle rad −0.067 0.633 −0.045   
Stdev bar angle rad −0.056 0.801 −0.201   
Bar length variability* 0.250 0.335 0.145   
Hand speed diff 0.473 0.639 0.108   
Norm absolute hand speed diff 0.027 0.849 0.166   
Hand speed peak bias −0.263 0.113 0.732   
Hand path bias* −0.098 0.342 −0.191   
Visually Guided Reaching Posture speed −0.077 0.519 0.512   
Reaction time 0.078 −0.162 0.863   
Initial direction error 0.547 0.291 0.435   
Initial distance ratio −0.915 0.073 − 0.096   
Speed maxima count 0.780 −0.324 −0.323   
Min max speed difference 0.738 0.568 0.098   
Movement time 0.105 −0.950 − 0.035   
Path length ratio 0.773 0.485 0.142   
Max speed 0.371 0.847 −0.148   
Reverse Visually Guided Reaching Posture speed −0.050 0.614 0.394   
Reaction time 0.022 −0.016 0.800   
Initial direction error 0.818 0.224 0.055   
Initial distance ratio −0.856 0.133 − 0.343   
Initial speed ratio −0.806 − 0.023 0.316   
Speed maxima count 0.837 −0.101 0.302   
Min max speed difference 0.263 0.721 0.053   
Movement time 0.621 −0.680 0.229   
Path length ratio 0.547 0.692 −0.013   
Max speed −0.248 0.871 −0.303   
Correction time 0.788 0.095 −0.330   
Object Hit Total hits −0.028 0.137 0.932   
Hits with left −0.612 0.053 0.658   
Hits with right 0.545 0.218 0.758   
Median error −0.046 0.119 0.647   
Miss biasa −0.040 − 0.022 − 0.365   
Right hand speed 0.322 0.847 0.204   
Movement area (right) 0.200 0.881 0.052   
Left hand speed −0.148 0.888 0.132   
Movement area (left) −0.219 0.915 0.061   
Hand bias of hits 0.893 0.166 0.082   
Hand transition −0.863 − 0.008 0.051   
Hand selection overlap −0.056 0.612 0.094   
Hand speed bias 0.876 0.037 0.140   
Movement area bias 0.719 −0.290 −0.063   
Object Hit and Avoid Total hits −0.125 0.933 0.037 0.067 0.006
Hits with left −0.092 0.780 −0.453 0.034 0.233
Hits with right −0.061 0.748 0.483 0.070 −0.210
Total Distractor hits 0.982 0.009 0.013 0.036 −0.012
Distractor hits (left) 0.925 0.034 −0.020 −0.025 0.019
Distractor hits (right) 0.896 −0.001 0.033 0.070 −0.027
Median error −0.414 0.419 0.076 0.073 −0.012
Miss bias −0.043 0.034 0.063 0.008 0.914
Right hand speed 0.133 0.239 0.304 0.724 −0.025
Movement area (right) 0.004 −0.054 0.360 0.854 0.050
Left hand speed 0.133 0.215 −0.241 0.764 0.136
Movement area (left) −0.010 −0.035 − 0.327 0.922 − 0.125
Hand bias of hits −0.010 0.042 0.809 0.058 −0.387
Hand transition −0.060 0.030 −0.824 −0.082 − 0.390
Hand selection overlap 0.021 −0.291 0.107 0.568 0.124
Hand speed bias 0.003 0.045 0.840 0.007 −0.238
Movement area bias 0.029 −0.029 0.860 −0.131 0.239
Objects hit 0.484 0.856 0.003 0.037 −0.041
Distractor proportion 0.963 −0.112 −0.003 0.027 −0.005
Object processing rate −0.380 0.799 0.000 0.071 0.041
  1. Bold text indicates that the component loading is substantial (≥ .40). adenotes that the KINARM parameter did no substantially load onto any component