Related Experiment Videos
The remote distractor effect in saccade programming: channel interactions and lateral inhibition
Casimir J H Ludwig1, Iain D Gilchrist, Eugene McSorley
1Department of Experimental Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1TN, UK. c.ludwig@bristol.ac.uk
Vision Research
|February 15, 2005
Summary
The saccadic remote distractor effect (RDE) depends on spatial frequency. Low-medium frequency distractors consistently caused RDE, while high frequency distractors only interfered when target and distractor frequencies matched.
Area of Science:
- Visual perception
- Oculomotor control
- Computational neuroscience
Background:
- The remote distractor effect (RDE) is a phenomenon in visual attention where a distractor, presented away from the saccade target, influences saccade behavior.
- Understanding the factors modulating RDE, such as stimulus properties, is crucial for visual neuroscience.
Purpose of the Study:
- To investigate how the spatial frequency content of target and distractor stimuli affects the saccadic remote distractor effect (RDE).
- To develop and test a computational model explaining the observed RDE dependencies.
Main Methods:
- Participants performed saccade tasks with Gabor patches as targets and distractors.
- The spatial frequency of both targets and distractors was systematically varied.
- A quantitative model based on lateral inhibition was developed and compared to experimental data.
Main Results:
- A significant RDE was observed with low-to-medium spatial frequency distractors, irrespective of target spatial frequency.
- High spatial frequency distractors caused interference only when their spatial frequency matched that of the target.
- The proposed lateral inhibition model did not fully explain the interaction between target and distractor spatial frequencies.
Conclusions:
- Spatial frequency plays a critical role in modulating the RDE.
- The findings suggest that interactions between visual channels at an earlier processing stage, rather than solely within the oculomotor decision unit, underlie the observed effects.