Person location estimation (catR version)

Outputs a vector of person locations, one for each row in the dataframe.

Usage

RIestThetasOLD(data, itemParams, method = "WL", theta_range = c(-10, 10))

Arguments

data

Dataframe with response data only (no demographics etc), items as columns

itemParams

Optional item (threshold) location matrix

method

Estimation method (defaults to "WL")

theta_range

Range of theta (person location) values

Details

Uses thetaEst() function from catR package to estimate person locations (thetas) for a dataframe with item data as columns and persons as rows. Defaults to use WL estimation (lower bias than ML, see Warm, 1989).

A version for multi-core processing is available as RIestThetasCATr().