Fit a dichotomous Rasch model by JMLE (ordinal -> interval)
Usage
rasch_measure(x, max_iter = 200, tol = 1e-05)
Arguments
- x
persons x items matrix of 0/1 responses (NA allowed). Extreme
persons/items (all-0 or all-1) are dropped from calibration.
- max_iter, tol
convergence controls.
Value
list: `theta` (person measures, logits), `delta` (item difficulties,
centred), `raw_person`, `converged`, `iterations`.