Item selection function that delivers an item an item drawn at random from the item bank to each respondent.

Each respondent has their own next item drawn at random from the remaining items.

Usage

select_random(
  pers,
  item,
  resp,
  resp_cur = NULL,
  adj_mat = NULL,
  select_seed = NULL
)

Arguments

pers

A dataframe of current respondent ability estimates.

item

A dataframe of current item parameter estimates.

resp

A long-form dataframe of all potential pre-simulated item responses.

resp_cur

A long-form dataframe of administered item responses.

adj_mat

An item-item adjacency matrix, where each entry is the count of individuals who have respondent to both item i and item j. See documentation for construct_adj_mat

select_seed

A random seed used only for item selection. Cleared each time this function is run.

Value

A long-form dataframe of all previously administered item responses with the new responses from this iteration appended to the end.