You can define test variables here, which will be determined before the questions are displayed (in short: pre-variables). If you wish to use these test variables as random parameters in your questions, they need to be linked to question variables. The value will be assigned before the first question is displayed. Please note that all variables set in the question will override the linked values.
The following example for using (pre-processed) test variables shows possible application scenarios:
Define test variables which will be recalculated after submission of each question (in short: post-variables). The value calculation may include values determined during the test, such as the participant response, points achieved or the number of attempts made. This allows to monitor points and errors, which can be used to control subsequent questions, hints or content of feedback.