01-29-2022, 06:17 PM
You should calibrate your participant before you start recording and only recalibrate if you need to. If there is an offset between the gaze cursor and the drift check target (which is not corrected by asking the participant to look at the target) then the ESC key can be pressed and a new calibration performed. After the calibration, pressing O will resume the task from the point at which you left off to recalibrate.
Recalibrating in the absence of any indication that the current calibration model is inaccurate risks replacing a good calibration model with a less good model, so you should only ever recalibrate if you need to. Drift-checks can be used between trials / blocks of trials to check whether the current calibration model is still accurate. You should perform a new calibration if you notice a persistent offset between the gaze cursor and the drift-check target (i.e., an offset that doesn't resolve when the participant focuses on the target).
Recalibrating from a drift check screen
Recalibrating in the absence of any indication that the current calibration model is inaccurate risks replacing a good calibration model with a less good model, so you should only ever recalibrate if you need to. Drift-checks can be used between trials / blocks of trials to check whether the current calibration model is still accurate. You should perform a new calibration if you notice a persistent offset between the gaze cursor and the drift-check target (i.e., an offset that doesn't resolve when the participant focuses on the target).
Recalibrating from a drift check screen
- Press the Esc key to interrupt the task and enter Camera Setup.
- Verify your camera image and thresholds.
- Begin a new calibration.
- Validate your new calibration to ensure it is accurate.
- Press the 'O' key to resume the task from the exact point where you left off.