Testing new physics/couplings at the NLC (Talk prsented in The 5th Topical Seminar on ``The irresistible rise of the Standard Model'', San Miniato al Todesco, Italy, April 21-25 1997)

I present a brief overview of the advantages of using a consistent effective Lagrangian approach in parameterizing virtual new physics effects. I then apply the formalism to certain top-quark processes.