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No direction specific costs in trans-saccadic memory.
A F Ten Brink1, T C W Nijboer2, J H Fabius3
1Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, the Netherlands; Department of Psychology, University of Bath, Bath, UK.
Neuropsychologia
|January 30, 2019
Summary
Trans-saccadic memory, which updates visual information across eye movements, showed no right hemispheric advantage. Spatial remapping accuracy was similar for leftward versus rightward eye movements in healthy participants.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Visual Perception
Background:
- We perceive a stable visual world despite frequent eye movements (saccades).
- Spatial remapping updates visual information across saccades, crucial for trans-saccadic perception.
- Previous research suggested right hemispheric dominance in spatial remapping, implying better memory for locations remapped into the right hemisphere.
Purpose of the Study:
- To investigate hemispheric asymmetries in trans-saccadic memory accuracy.
- To compare memory for locations remapped within the left versus right visual field.
- To re-evaluate the hypothesized right hemispheric dominance for spatial remapping.
Main Methods:
- Participants memorized an item's location, performed a single saccade, and indicated the item's shift direction.
- A staircase method adjusted task difficulty to precisely measure accuracy.
- Bayesian repeated measures ANOVAs analyzed differences between left/right eye movements and left/right visual field remapping.
Main Results:
- No significant evidence for directional differences in trans-saccadic memory accuracy (BF10 = 0.23).
- Some evidence suggested enhanced trans-saccadic memory for items remapped within the left visual field compared to the right (BF10 = 4.00).
- This left visual field advantage may be linked to a leftward spatial attention bias.
Conclusions:
- The hypothesized right hemispheric dominance for spatial remapping does not translate to asymmetric trans-saccadic memory capacities in healthy individuals.
- Trans-saccadic memory accuracy appears largely symmetrical between hemispheres.
- A potential leftward attention bias might influence spatial remapping within the visual field.
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