We have assumed that an effective central potential in place of actual N-N interaction can be used in general for finite-nucleus calculations. By introducing, however, a class of residual two-body interactions, we have studied the nucleon correlation effect in the independent-particle-model (IPM) wave functions of nuclei. As an illustrative example, this method has been applied to the deuteron. A shell-model description of the deuteron is proposed that takes proper account of the nucleon correlation and the residual potential. We have obtained an adequate agreement with the elastic electron-scattering data even for the deuteron without using the tensor force. This method should be applicable to many other nuclear problems and result in interesting predictions.