1Hofman K, Hosokawa M, Blake R J, et al. Problem- based learning outcomes: ten years of experience at the University of Missouri-Columbia School of Medicine[J].AcadMed,2006,81(7):617-625.
2Sandra KR, Robert GK, Charles FS. Problem based learning versus a tradition educational methodology: a comparison of preclinical and clinical periodontics perfor- mance[J].J Dent Educ, 2005, 69(6):649-662.
3Preeti B, Ashish A, Shriram G. Problem based learning (PBL)-An effective approach to improve learning out- comes in medical teaching[J]. J Clin Diagn Res, 2013, 7 (12): 2896-2897.
4Gaffney T W,Perryman C. Educational achievement,per- sonality,and behavior:, assessment, factor structure and implications for theory and practice[J].J Appl Meas,2012, 13(2): 181-204.