Simulated forward and backward self motion, based on realistic parameters, causes motion induced blindness

Area of Science:

• Visual perception
• Neuroscience
• Human factors

Background:

• Motion Induced Blindness (MIB) is a phenomenon where salient targets vanish against moving backgrounds.
• Previous research has not investigated MIB using optic flow (simulated self-motion).

Purpose of the Study:

• To investigate if optic flow, simulating driving motion, can induce MIB.
• To examine the effect of mask speed, motion type, and target location on MIB.
• To explore the relationship between MIB, saccades, and pupil response.

Main Methods:

• Participants viewed MIB targets against masks with varying speeds (35-80 km/h) and motion types (optic flow, radial, random, static).
• Eye-tracking experiments analyzed saccades and pupil responses in relation to target disappearance.
• Two eye-tracking experiments were conducted with 18 and 19 participants respectively.

Main Results:

• Target disappearance significantly increased with faster mask speeds and presentation in the upper visual field.
• Simulated optic flow and 2-D radial motion induced comparable MIB, exceeding static mask conditions.
• Saccades did not fully explain the observed MIB differences, suggesting optic flow's role.

Conclusions:

• Simulated self-motion optic flow can induce Motion Induced Blindness in controlled settings.
• MIB induced by optic flow may not be subjectively salient, potentially explaining its absence during driving.
• Findings have implications for driving safety and Head-Up-Display (HUD) design.