I have 42 DV's that I have individually modelled versus the same single IV - using GAMs via the mgcv package in R. This has produced a total of 42 individual models for each of my DV's and the associated p-vlaues.
My question is: should I be adjusting p-values under the above circumstances? I understand that if one has more than 1 IV then the p-value is simply divided by the number of IV's (i.e. 0.05/20 - in the case of 20 IV's). However, I'm struggling to find any information to support this approach when there is only a single IV being considered.