Measurements of the temperature dependence of the normal state resistivity, &rgr;n(T), for (R0.8Pr0.2)Ba2Cu3O7−&dgr;(R=Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, and Yb) are reported. We found that &rgr;nis linearly dependent on the temperature (except R=Nd). At a constant temperature, &rgr;nis linearly dependent on the ionic radius of R. The results are interpreted in terms of the hybridization between the local states of the Pr ion and the valence‐band states of the CuO2planes. ©1995 American Institute of Physics.