[en] The bridge model for isospin-forbidden reactions proposed by Friedman is examined in detail. In this model, mixing between different isospin states can proceed only through the intermediary bridge states. Intermediate structure having a definite form is predicted to exist in the averaged S-matrix elements. It is shown that the predicted effects occur in the recent ¹⁶O(d,α₁)¹⁴N(2.31) and ¹⁴N(α,α₁)¹⁴N(2.31) data obtained by Jolivette and Chen, respectively. The bridge states are interpreted in the framework of a rotational model. Numerical calculations of the isospin-mixing matrix element in the rotational model are performed. A significant increase is found in the magnitude of the isospin-mixing matrix elements with deformation