5. 5
What’s a Good Model?
• Goodness of Fit (GoF)
– Chi-square test
– CFI (Comparative Fit Index)
– RMSEA (Root Mean Square Error
Approximation)
– TLI (Tucker Lewis Index) AKA
NNFI (non-normed fit index)
– GFI (Goodness of Fit Index)
– And many, many, many more
– IFI, NFI, AIC, CIAC, BIC, BCC
6. 配適度指標分類
• 差異函數
– chi square test, chi-square/df (relative
chi-square / normed chi-square), RMSEA,
RMR and SRMR
• 目標模型與空(獨立)模型比較
– CFI, NFI, TFI, RFI and IFI
• 資訊理論配適度
– AIC, BCC, BIC, and CAIC
• 非集中性測量
– NCP
7. 報告多個配適度指標
• 配適度指標會受到幾個因素的影響
– 模型設定、樣本數、模型複雜度、參數估計、
資料常態、變數相關及估計方法等
• Marsh, Balla, and Hau (1996)及
Jaccard and Wan (1996)建議報告不同
類別的配適度指標以克服不同指標的限制
Marsh, H. W., Balla, J. R., & Hau, K. T. (1996). An evaluation of
incremental fit indexes: A clarification of mathematical and empirical
properties. In G. A. Marcoulides & R. E. Schumacker (Eds.), Advanced
structural equation modeling techniques(315-353 . Mahwah , NJ :
Lawrence Erlbaum.
Jaccard, J., & Wan, C. K. (1996). LISREL approaches to interaction
effects in multiple regression. Thousand Oaks, CA: Sage Publications.