The R-DIF scaling function for item slopes.
a_fun.RdComputes the scaling function a2/a1 for item slopes (a) in groups g = {1, 2}
Arguments
- mle
the output of
get_model_parms- log
logical: return of log(a2/a1)?
a_fun.RdComputes the scaling function a2/a1 for item slopes (a) in groups g = {1, 2}
the output of get_model_parms
logical: return of log(a2/a1)?