It is well known that the non-minimal coupling \xi \phi ^ { 2 } R between the inflaton and the Ricci scalar affects predictions of single field inflation models .
In particular , the \lambda \phi ^ { 4 } quartic inflation potential with \xi \gtrsim 0.005 is one of the simplest models that agree with the current data .
After reviewing the inflationary predictions of this potential , we analyze the effects of the radiative corrections due to couplings of the inflaton to other scalar fields or fermions .
Using two different prescriptions discussed in the literature , we calculate the range of these coupling parameter values for which the spectral index n _ { s } and the tensor-to-scalar ratio r are in agreement with the data taken by the Keck Array/BICEP2 and Planck collaborations .