We provide all four tasks from the paper here. Both have been written using Josh deLeeuw's jsPsych toolbox (http://www.jspsych.org/).
These tasks require communication with a PHP server in order to run. You can do this by running them on your own domain, or by using a tool like XAMPP to run the PHP server locally.
In order to save the data, you will need to be able to connect to a SQL databa...