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Modulation of the motion aftereffect by selective attention
1Vision Center Laboratory, Salk Institute, San Diego, California 92138-9216.
Nature
|March 1, 1990
Summary
The motion aftereffect, where stationary objects appear to move after viewing a moving pattern, is reduced when attention is divided. This suggests attentional mechanisms influence motion perception and its aftereffects.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Vision Science
Background:
- The motion aftereffect (MAE) is a well-documented visual phenomenon.
- Previous research suggests MAEs are generated in the visual cortex.
- Hypotheses propose neuronal fatigue underlies MAEs.
Purpose of the Study:
- To investigate the role of attentional mechanisms in the motion aftereffect.
- To determine if dividing attention affects the magnitude of MAEs.
Main Methods:
- Participants viewed a moving textured background while performing a superimposed discrimination task.
- The magnitude of the subsequent motion aftereffect to the background was measured.
Main Results:
- Engaging in a separate discrimination task significantly reduced the subsequent motion aftereffect.
- This indicates that attentional load impacts MAE generation.
Conclusions:
- Motion aftereffects are susceptible to attentional modulation.
- Attentional mechanisms play a crucial role in visual motion perception and adaptation.