One of the main sources of bias in eye-tracking studies comes from the Hawthorne Effect - the tendency for respondents to change their behavior because they know they are being studied. If respondents knows their eyes are being tracked, then they often cannot help but change their gaze behavior.
RISEBETA can reduce or eliminate this effect as it allows researchers to extract eye-tracking data from a video recording of a respondent’s face as a post-study process.
Here’s one way you can proceed.
STEP 1: Ask the respondent to agree to be recorded during the study (for research ethics reasons).
STEP 2: Conceal the eye-tracker camera behind an infra-red transmitting opaque glass.
STEP 3: Start recording the video in RISEBETA.
STEP 4: Conduct the study.
STEP 5: Get permission to extract eye-tracking data from the video recording as a post-study process.
STEP 6: Ask the respondent to perform a one-off calibration.
STEP 7: Load the user calibration and video into RISEBETA and extract eye-tracking data.
Using this approach, you will be able to seek permission to extract gaze-data as a post-study process. The respondent does not need to be told about eye-tracking till after the study. This leads to a new term for this kind of study : "Blind Eye-Tracking Studies".