1.3. Overview of the Present Work. Whereas the CP correction for correlated wave function methods has been considered systematically, as has that of doublehybrid functionals, the latter constitute a relatively small niche in the overall pantheon of DFT methods and the CP correction has not been considered systematically for other classes of functionals. In addition, we want to understand how basis sets of double-and triple-ζ quality behave, as these are the largest basis sets that are typically employed in DFT calculations. We will therefore examine the effects of CP correction for interaction energies computed using a set of density functionals that perform well for noncovalent interactions, using basis sets as small as 6-31G*. These tests span a range of system sizes because BSSE is size-extensive and large supramolecular complexes exhibit dramatically larger CP corrections as compared to small dimers. Finally, we will consider whether CP correction is more or less economical than simply enlarging the basis set, as a strategy to obtained converged DFT/CBS values of ∆E int .