CgnData class is a simple string container for temporally storing task information of a current trial. It concatenates strings provided by append
method to its internal data string, inserting a predetermined separater character (by default \t). So you can temporally store trial conditions, response times, correct/error flags, or whatever information about current trial. When a trial ended, you can print the resultant data string to regular Serial using out
method. If a trial is aborted during a progression and the data is no more needed, you can clear the temporal storage by clear
method.