Item selection by maximum Fisher information.

Administers the remaining item with the highest information for each respondent, computed from the current parameter estimates and a 2PL item response function.

Usage

select_max_info(pers, item, R, admin, adj_mat = NULL)

Arguments

pers: A data frame of current respondent ability estimates.
item: A data frame of current item parameter estimates.
R: A respondent-by-item matrix of potential responses.
admin: An integer administration matrix; 0 indicates an item has not been administered to a respondent. See meow() for details.
adj_mat: An item-item adjacency matrix. See construct_adj_mat().

Value

An updated administration matrix with the most informative remaining item marked for each respondent.

Examples

sim <- meow(select_max_info, update_theta_mle, data_simple_1pl,
            data_args = list(N_persons = 10, N_items = 10), fix = "item")
nrow(sim$results)
#> [1] 6