Constructs an item pool adjacency matrix.

For an item pool with N items, this is an NxN matrix. The diagonal elements contain the number of times an item has been exposed. The off-diagonal elements contain the number of times the pair of items has been exposed to the same respondent. In general, this function is never called directly, but instead called within meow() calls. That said, it is exposed to the user to aid with testing other functions they may write.

Usage

construct_adj_mat(resp_cur, pers_tru, item_tru)

Arguments

resp_cur

A long-form dataframe of observed item responses.

pers_tru

A dataframe of true respondent abilities.

item_tru

A dataframe of true item parameters.

Value

An adjacency matrix of type matrix.