Even with the DFT-D3(BJ) correction, spin-scaled functionals are generally outperformed by unscaled functionals due to larger underbinding errors for the pyrene excimer. However, the DFT-D corrections do generally reduce errors and bring the performance of spin-scaled and unscaled double hybrids into closer comparison. For example, PBE-QIDH-D3(BJ) and its spin-scaled variants predict D e differences of less than 2 kcal/mol from one another [Figure (a)-(c)], whereas dispersion-uncorrected these methods deviate within 3.33 kcal/mol.