Figure 7
Rank correlation of sensory and motor related amplitudes in single trials with reaction time. (A) Scatter plot with 192 points representing all Sensorimotor (SM) EDs. Red points represent Sensorimotor EDs in cluster 1 (58 SM EDs). Yellow points represent Sensorimotor EDs in cluster 2 (53 SM EDs). Blue points represent Sensorimotor EDs in cluster 3 (81 SM EDs). The OX axis represents rank correlation (Spearman’s rho) of reaction times (RT) in trials and dot products (SDot) of the sensory related ERP and single trials on the interval from 100 ms to 300 ms after the stimulus onset in a SM IC. The OY axis represents rank correlation of reaction times in trials and dot products (MDot) of the motor related ERP and single trials on the interval from −100 ms to 100 ms around the motor onset in a SM IC. (B) Table of mean values ± STD of correlation coefficients for all 192 SM EDs and for individual clusters depicted in Fig. 7A. RCorr(SDot,RT) represents rank correlation (Spearman’s rho) of sensory related dot products in trials and reaction time in trials. RCorr(MDot,RT) represents rank correlation of motor related dot products in trials and reaction time in trials. Corr(SDot,MDot) represents linear correlation of sensory and motor related dot products in trials. Negative rank correlation coefficients reflect a correspondence of higher amplitude (dot product) with shorter reaction time in trials in an IC. We calculated the mean values without application of Fisher z-transformation, as the extreme values of correlation coefficients were between −0.4 to 0.4 with the highest density around zero.
