1Bachman,Lyle F.& Adrian S.Palmer.Language Testing in Practice[M].Oxford:Oxford University Press,1996.
2Cronhach,L.J.and P.E.Meehl.Construct validity in psychological test[A].A.W.Ward.H.W.Stoke and M.M urravWard.Educational Measurement[C].Lanham:University Press of America.Inc.1955.