Table 3 Post-hoc pairwise comparisons of significant interactions.

Time x COMT

Val+_pre–post

− 7.346

0.482

− 15.233

< 0.001

Val−_pre–post

0.224

0.548

0.409

0.977

Pre_val+–val-

0.883

4.786

0.184

0.998

Post_val+–val-

8.453

4.786

1.766

0.297

Time x tDCS x COMT

Pre, val+_{sham–active}

− 2.453

6.413

− 0.383

0.999

Pre, val–_{sham–active}

− 8.415

7.107

− 1.184

0.934

Pre, sham_val+–val-

3.863

6.907

0.559

0.999

Pre, active_val+–val-

− 2.098

6.628

− 0.317

1.000

Val+, sham_pre–post

− 4.348

0.739

− 5.884

 < 0.001

Val + , active_pre–post

− 10.345

0.620

− 16.687

 < 0.001

Val–, sham_pre–post

− 2.467

0.851

− 2.898

0.0730

Val–, active _pre–post

2.916

0.690

4.225

 < 0.001

Val+, sham _pre–post–Val+, active_pre–post

6

0.964

6.219

 < 0.001