Least squares fits including effective two- and three-body interactions have been performed for the mixed configurations (4d+5s)4 in ZrI and (4d+5s)6 in MoI. A test of the eigenvectors in intermediate coupling derived from the fits has been accomplished by comparing calculatedg J values andg J values, which have been measured with high precision by atomic beam magnetic resonance. The agreement found is typically better than a few parts in 104 except for some strongly mixed high-lying states in Mo.