Accuracy threshold defines the accuracy that participants must achieve when performing their session. The accuracy is calculated at the end of the calibration step. Participants will see a circle getting smaller over 10 seconds at the end of the calibration. The average value from the gaze points collected during this period to the center of the screen, corresponds to the accuracy value. If the accuracy value is below the accuracy threshold, the participant can continue with their session. Otherwise, the participant receives a notification to repeat the calibration under better conditions. This ensures a certain quality of the collected data.