Item-based example item pool (1000 items).
This pool is associated with the following objects:
itempool_science an item_pool object containing 1000 items.
itemattrib_science an item_attrib object containing 9 item-level attributes.
constraints_science a constraints object containing 36 constraints.
Also, the following objects are intended for illustrating expected data structures.
itempool_science_data a data.frame containing item parameters.
itemattrib_science_data a data.frame containing item attributes.
constraints_science_data a data.frame containing constraint specifications.
itempool_science <- loadItemPool(itempool_science_data)
itemattrib_science <- loadItemAttrib(itemattrib_science_data, itempool_science)
constraints_science <- loadConstraints(constraints_science_data,
itempool_science, itemattrib_science)