IBM® SPSS® Amos™ 28
Bollen's (Bollen, 1986) relative fit index ( RFI) is given by
,
where 
and 
are the discrepancy and the degrees of freedom for the model being evaluated, and 
and 
are the discrepancy and the degrees of freedom for the baseline model.
The RFI is obtained from the NFI by substituting F/d for F.
RFI values close to 1 indicate a very good fit.
Use the \rfi text macro to display RFI on a path diagram.
