Item selection by random draw from the remaining item bank.

Each respondent's next item is drawn at random from the items they have not yet been administered.

Usage

select_random(pers, item, R, admin, adj_mat = NULL, select_seed = 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().
select_seed: A random seed used only for item selection. The seed is cleared after use so that successive simulations vary unless a seed is given.

Value

An updated administration matrix with a random next item marked for each respondent.

Examples

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