Perception of elasticity in the kinetic illusory object with phase differences in inducer motion

Area of Science:

• Visual Perception
• Psychophysics
• Neuroscience

Background:

• Subjective contours are perceived with moving figures, but rigidity and deformation perception remain unclear.
• Previous studies focused on illusory rigid objects, neglecting material properties like elasticity.
• The influence of motion dynamics on illusory surface material perception is unexplored.

Purpose of the Study:

• To determine if oscillation phase difference affects perceived elasticity of illusory surfaces.
• To investigate the relationship between perceived elasticity and subjective contour shape.
• To explore material property perception in dynamic visual stimuli.

Main Methods:

• Experiment 1: Manipulated phase differences in oscillating inducers to assess perceived elasticity.
• Experiment 2: Employed multi-dimensional scaling to analyze subjective contour shape (linear vs. curved).
• Controlled visual stimuli to create illusory surfaces with subjective contours.

Main Results:

• Perceived elasticity of illusory surfaces systematically changed with varying phase differences.
• Subjective contours of the moving illusory object were perceived as more curved than linear across all conditions.
• A correlation between motion dynamics and material property perception was observed.

Conclusions:

• Phase difference in object motion is a key factor in perceiving motion-related elasticity.
• Subjective contour shape is influenced by motion, potentially correlating with rigidity perception.
• Dynamic visual cues contribute significantly to the perception of material properties.