Fig 5. The effects of anodal and cathodal tDCS are also not correlated when pooling data from both studies.

As in Fig 4, data points show AB magnitude change scores (tDCS—baseline) in the anodal session (x-axis) and the cathodal session (y-axis), but now for each participant in study 1 [20] and the present study (study 2). While study 1revealed a negative partial correlation, suggesting opposite effects of anodal and cathodal tDCS, this effect appears to be absent when based on the combined data of both studies. The partial correlation coefficient (attempting to adjust for Session order) is printed in the upper left.