1[1]McLanghlin,J.A.,and Jordan G.B.1999.Logic models:A tool for telling your program's performance story[J].Evaluation and Program Planning,22:65-72.
2[2]Worthen,B.R.,Sanders,J.R.,and Fitzpatrick,J.L 1997.Program Evaluation:Altemative Approaches and Practical Guidelines[M].New York:Longman.
3[3]Wilson,M.,and Case,H.2000.An examination of variations in rater severity over time:A study of rater drift[A].In M.Wilson and G.Engelhard(Ed),Objective Measurement:Theory into Practice[C]Stamford,CT:Ablex.113-134.
