24‐2: Invited Paper: Interaction between Duty Ratio and Eye Movement for Motion Artifacts

Previous research compared the motion artifacts under tracking and fixating conditions with moving stimulus and suggested that shorter duty ratios resulted in enhanced display quality by minimize motion blur in tracking condition (Hoffman et al, 2014). However, in real‐world, interactions between eye movements and stimulus motion are more intricate than their experimental setups. We investigated the interaction further by employing various eye movement and stimulus motion combinations: A. Smooth Pursuit + Moving stimulus, B. Smooth Pursuit + Stationary stimulus, C. Fixation + Moving stimulus, D. Saccade + Stationary stimulus, and E. Saccade + Moving stimulus. Participants compared short duty ratio (10%) and a long duty ratio (90%) stimuli at 60 Hz to a reference stimulus of a 100% duty ratio at 1440 Hz. Participants perceived the short duty ratio stimulus as more closely resembling the reference stimulus in condition A as in the previous study. Interestingly, in conditions B and E, participants reported the long‐duty ratio stimulus is more similar to the reference stimulus. There was no significant difference between short and long duty ratios in conditions C and D. These findings challenge the conventional assumption that less motion blur (associated with short duty ratio) is inherently more natural and suggest that even strong motion blur (associated with long duty ratio) can be perceived as more natural under specific conditions. This study underscores the importance of considering the complex interactions between eye movements, duty ratio, and stimulus motion when evaluating display image quality.