This update function treats item parameters as fixed and known, updating person ability estimates after each iteration according to a maximum likelihood estimate based upon a 2PL item response function.
Usage
update_theta_mle(pers, item, resp)
Arguments
- pers
A dataframe of current respondent parameter estimates.
- item
A dataframe of item parameter values.
- resp
A long-form dataframe of only observed item responses.
Value
An list of three objects, only one of which is updated from the function input: pers is a dataframe with updated respondent parameter estimates, item is the dataframe of item parameter values. resp_cur is the dataframe of observed item responses.
