The inner (opaque) bars in Figure With dispersion-correction, spin-scaled variants still tend to give larger MADs than unscaled variants of the same base functional. However dispersion-corrected functionals mitigate some of the underestimation associated with spin scaling to give more comparable errors between unscaled and scaled variants. As expected from studies on MP2, SCS-MP2 and SOS-MP2, the impact of dispersion corrections increases in the same order; an exception to this is SCS-RSX-QIDH whose small dispersion contributions is likely the result of it having the largest indirect same-spin scaling component by a whole order of magnitude (see Tab. 1). For dispersionuncorrected functionals, the best and worst MADs both belong to spin-scaled functionals (SCS-ωPBEPP86 and SOS-B2PLYP, respectively), whereas when dispersion-corrected the best and worst in D e belong to unscaled functionals (B2GP-PLYP-D3(BJ) and ωPBEPP86-D4, respectively), ranging from 0.78 to 7.87 kcal/mol.