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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
Published on: January 23, 2017
Spatio-temporal low-level neural networks account for visual masking
Uri Polat1, Anna Sterkin, Oren Yehezkel
1Goldschleger Eye Research Institute, Tel-Aviv University, Sheba Medical Center, 52621 Tel-Hashomer, Israel.
Advances in Cognitive Psychology
|June 3, 2010
Summary
Temporal masking effects on visual processing depend on target processing time, and the spatial-temporal arrangement of target and mask. These factors influence whether suppression or facilitation occurs, impacting object perception.
Area of Science:
- Visual Neuroscience
- Cognitive Psychology
- Human Perception
Background:
- Temporal masking is a key paradigm for studying visual information processing.
- Masking typically involves presenting a mask shortly before or after a target, reducing the target's response.
Purpose of the Study:
- To investigate the critical factors influencing visual masking effects.
- To differentiate between suppression and facilitation in visual masking.
Main Methods:
- Conducted psychophysical experiments.
- Utilized visual evoked potential (VEP) recordings.
- Analyzed the impact of target processing time, target-mask order, and spatial arrangement.
Main Results:
- Masking effects critically depend on the spatial-temporal combination of target and mask.
- Suppression occurs with short temporal separation and specific spatial arrangements.
- Lateral facilitation is observed under different spatial-temporal conditions, particularly when the mask precedes the target.
Conclusions:
- Visual masking (suppression or facilitation) reflects spatial-temporal integration of feedforward and lateral neural inputs.
- The timing of inhibitory and excitatory inputs determines whether masking leads to suppression or facilitation.
- Facilitation may enhance object perception by promoting the integration of local elements into a global percept.
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