There are 13 types of item models.
The number generator package creates number series completion items.
Over time, there may be an increase in the number of item models.
These item models are created based on certain cognitive operators which we assumed may predict the difficulty of the item.
This package is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 3, as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details.
A copy of the GNU General Public License, version 3, is available at https://www.r-project.org/Licenses/GPL-3