Write to Data File (Questionnaire Files)

QuickInfo

By checking this field, data will be written to the data file. When the value is unchecked, MediaLab will not write a value for this variable to the data file and will not include the item name in the data input file. See Data for more details.

For item types like instruction items that do not gather input data, the response "ok" is written to the data file to confirm that the item was presented (i.e., as opposed to being skipped). If this you do not to write data from these items for whatever reason (e.g., practice trials), simply uncheck the Write to Data File field for that item.