Six indexes were used
to assess the degree of model fit: the χ2 statistic, the
ratio of chi-square to degree of freedom (χ2/df), the
root mean square error of approximation (RMSEA),
the goodness-of-fit index (GFI), the normed fit index
(NFI), the parsimonious goodness-of-fit index (PGFI),
and the critical N (CN).