@ time stamp (optional)
By entering @ as a parameter for any item in a questionnaire, you can have MediaLab write a time stamp at the onset of that item in order to keep track of events in real time. When you do this, a time stamp will be appended to a file called "timestamps.csv" located in the data folder. Each time stamp will include the Subject ID, the variable name, the time at which the item started (e.g., 12:33:22), the milliseconds elapsed from the beginning of the experiment and the number of milliseconds passed since the last timestamp. The timestamp function can be used with all item types.