marginally non-significantP = 0.053
Moreover, when age and SVL were simultaneously analysed in a multiple regression on AUC (marginally non-significant: F 2,35 = 3.203; r 2 = 0.155; P = 0.053), we detected a significant relationship of AUC with age ( F 1,35 = 6.195; β = − 0.498; P = 0.018), but not with SVL ( F 1,35 = 1.474; β = 0.243; P = 0.233).