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Influence of frame and probe paths on the frame effect
Stuart Anstis1,2, Patrick Cavanagh3,4,5
1Department of Psychology, University of California San Diego, La Jolla, CA, USA.
Moving frames significantly alter perceived object locations. This study reveals how probe motion and frame motion interact, influencing visual perception and reference frame selection.
Area of Science:
- Visual perception
- Psychophysics
- Cognitive neuroscience
Background:
- Moving frames of reference can induce large spatial displacements in perceived probe locations.
- Understanding the factors influencing these spatial illusions is crucial for visual neuroscience.
Purpose of the Study:
- To investigate the influence of probe and frame motion on perceived spatial shifts.
- To determine the role of perceptual grouping in modulating frame effects.
- To explore the competition between moving frames and static backgrounds in establishing reference frames.
Main Methods:
- Experiments involving flashed and continuously moving probes presented within moving frames.
- Systematic manipulation of probe motion and frame displacement.
- Analysis of perceived location shifts and qualitative observations of grouping phenomena.
Main Results:
- Flashed probes exhibited significant position shifts, while continuously moving probes showed a reduced effect (one-third).
- Static probes did not show the frame effect due to perceptual grouping with the background.
- Moving probes demonstrated intermediate illusory shifts, with stronger grouping to the frame when the frame's path was complex.
Conclusions:
- Perceptual grouping with static backgrounds or moving frames critically influences spatial reference frame selection.
- The perceived location of a probe results from a dynamic competition between visual elements.
- Probe motion modulates the strength of illusory spatial shifts induced by moving frames.
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