Interestingly, the values of 𝜆 mGCV , and To assess how 𝜆 LC , 𝜆 mGCV , and 𝜆 rGCV correlate with 𝜆 opt , the scores introduced in Section 2.3 were used. GCV presents the lowest values for all the scores, with kf-CV coming second, see Table and Table . The wall clock time needed to minimize each score was also computed (Table ).