In the first place, for hypothesis one, I have conducted a standard multiple regression of B,C and D (the IVs) on A (the DV).

After this, for hypothesis two, I have conducted partial correlation of A (the DV) and B partialling C and D.

For hypothesis three, I have conducted partial correlation of A (the DV) and C partialling B and D.

for hypothesis four, I have conducted partial correlation of A (the DV) and D partialling B and C.

Please confirm for me whether I am right to conduct the partial correlations after the multiple regression or otherwise. Please, I expect your reply.Thanks