And then we examined another sampling with a questionnaire of the 47 items,and made confirmatory analysis,maximum-likelihood estimation and Amos 4.0 to deal with the data. The findings showed that the 20-items questionnaire was better suited.

• 用 47项目问卷,用另一样本验证性因素分析,用最大似然法,Amos修正,保留20个项目。