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Backward illusory line motion: Visual motion perception can be influenced by retrospective stimulation
Fuminori Ono1,2,3, Yuki Yamada4,5,6, Kohske Takahashi7,8,9
1Department of Education, Yamaguchi University, Yamaguchi, Japan.
Journal of Vision
|June 12, 2023
Summary
Illusory line motion (ILM) perception depends on timing. When a cue follows a line, the line appears to move toward the cue (backward ILM), with attention playing a supporting role.
Area of Science:
- Visual perception
- Cognitive psychology
- Neuroscience
Background:
- Illusory line motion (ILM) is a visual phenomenon where a line segment appears to move.
- Prior research established ILM direction based on cue-stimulus temporal order.
Purpose of the Study:
- To investigate backward illusory line motion (ILM) where the cue follows the line.
- To determine the influence of attention on backward ILM.
Main Methods:
- Experiment 1: Presented visual cue after line onset.
- Experiment 2: Replicated backward ILM findings.
- Experiments 3-5: Assessed roles of endogenous and exogenous attention.
Main Results:
- Backward ILM was robustly observed when the cue followed the line.
- Attentional effects were detected but insufficient to fully explain backward ILM.
- Temporal order of cue and stimulus onset significantly influenced ILM direction.
Conclusions:
- Backward ILM is strongly dependent on the temporal sequence of cue and stimulus presentation.
- Attentional shifts contribute to, but do not solely drive, backward ILM perception.
