Asian-Pacific Journal of Second and Foreign Language Education

Table 7 Goodness of fit index (GFI) for the main model

From: A study of the proficiency and performance of Iranian Air Traffic Controllers: attitude, work experience and specific aviation English courses

Fitting Index	Desirable amount	Result
/df²χ	3.00>	2.359
GFI(goodness of fit index)	0.90<	0.971
RMSE(Root Mean Squared error)	0.08>	0.071
IFI )Incremental Fit Index (	0.90<	0.940
NFI(Normed Fit Index)	0.90<	0.901
CFI(Comparative Fit Index)	0.90<	0.938

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