A cognitive ergonomist is investigating how different dashboard interfaces affect the cognitive load of delivery drivers in urban environments. The researcher designs an experiment comparing a new windshield-projected Head-Up Display (HUD) against a traditional center-console touchscreen GPS. The study monitors 65 professional delivery drivers navigating a simulated dense city route, measuring both their objective eye-gaze deviation (time spent looking away from the road) and tactical decision-making speed.
Suggest one open question the ergonomist could use to obtain additional qualitative data from the drivers regarding their cognitive experience during this study.