We have reanalyzed the (e, e') and (p, p') data at 318 MeV on the stretched, 12& 2 and 14, states of Pb using the ideas of G. Brown and co-workers on the reduction of meson and nucleon masses in the nuclear medium.The reaction calculations are compared with new, large basis random-phaseapproximation calculations using a residual interaction, also modified, in a consistent way. The resulting interaction, based on the one boson exchange (~+ p) model, has reduced tensor and enhanced spin-orbit strengths. Agreement between electron and proton quenching factors is found for effective masses, m */m =0.79-0.86. The reduction or enhancement factors for the modified interaction are in qualitative agreement with those found in other analyses.PACS number(s): 21.30.+ y, 27.90.+b, 24.10.Ht