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Extrinsic grouping factors in motion-induced blindness
Dina Devyatko1,2, Alexander Pastukhov3,4
1Laboratory for Cognitive Research, National Research University Higher School of Economics, Moscow, Russia.
Plos One
|January 31, 2018
Summary
Grouping factors like common region and connectedness influence visual perception in motion-induced blindness. Common region increases simultaneous target disappearance, while connectedness reduces invisibility time.
Area of Science:
- Psychology
- Cognitive Neuroscience
- Visual Perception
Background:
- Motion-induced blindness (MIB) is a phenomenon where salient static targets disappear subjectively due to a surrounding moving mask.
- Understanding how grouping principles affect MIB is crucial for comprehending visual awareness and object perception.
Purpose of the Study:
- To investigate the impact of extrinsic grouping factors (connectedness, common region) on target disappearance in MIB.
- To examine if an illusory Kanizsa triangle influences the suppression of its inducing elements within the MIB display.
- To differentiate the effects of various grouping factors on perceptual dynamics.
Main Methods:
- Utilized the motion-induced blindness display with static targets and a moving mask.
- Manipulated extrinsic grouping factors: common region (single mask encompassing targets) and connectedness (line connecting targets).
- Introduced an illusory Kanizsa triangle to assess its effect on inducing Pac-Man elements.
- Quantified perceptual dynamics using proportion of disappearance time and proportion of simultaneous disappearance/reappearance events.
Main Results:
- Common region grouping significantly increased simultaneous disappearance/reappearance events but did not affect disappearance time.
- Connectedness grouping significantly decreased total invisibility time without impacting simultaneity.
- The illusory Kanizsa triangle showed no statistically significant effect on either measure.
- No significant interactions were found between grouping factors.
Conclusions:
- Extrinsic grouping factors differentially modulate perceptual dynamics in MIB, affecting aspects like target resilience and group behavior.
- Results suggest extrinsic grouping factors may influence perception differently compared to intrinsic ones.
- Employing multiple measures is essential for a comprehensive characterization of perceptual dynamics influenced by grouping.
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