Reduced Stokes parameters of the 2 P-2 state of lithium are measured u
sing superelastic electron-scattering techniques and calculated using
the convergent close-coupling method. The measurements and calculation
s are in excellent agreement at all scattering angles. This is particu
larly significant at the large scattering angles where there has been
a long-standing discrepancy between theory and electron-photon coincid
ence measurements in the corresponding electron-hydrogen scattering pr
oblem.