Journal article
Dynamic interactions between visual working memory and saccade target selection
Journal of vision (Charlottesville, Va.), Vol.14(11), pp.9-9
2014
DOI: 10.1167/14.11.9
PMCID: PMC4166143
PMID: 25228628
Abstract
Recent psychophysical experiments have shown that working memory for visual surface features interacts with saccadic motor planning, even in tasks where the saccade target is unambiguously specified by spatial cues. Specifically, a match between a memorized color and the color of either the designated target or a distractor stimulus influences saccade target selection, saccade amplitudes, and latencies in a systematic fashion. To elucidate these effects, we present a dynamic neural field model in combination with new experimental data. The model captures the neural processes underlying visual perception, working memory, and saccade planning relevant to the psychophysical experiment. It consists of a low-level visual sensory representation that interacts with two separate pathways: a spatial pathway implementing spatial attention and saccade generation, and a surface feature pathway implementing color working memory and feature attention. Due to bidirectional coupling between visual working memory and feature attention in the model, the working memory content can indirectly exert an effect on perceptual processing in the low-level sensory representation. This in turn biases saccadic movement planning in the spatial pathway, allowing the model to quantitatively reproduce the observed interaction effects. The continuous coupling between representations in the model also implies that modulation should be bidirectional, and model simulations provide specific predictions for complementary effects of saccade target selection on visual working memory. These predictions were empirically confirmed in a new experiment: Memory for a sample color was biased toward the color of a task-irrelevant saccade target object, demonstrating the bidirectional coupling between visual working memory and perceptual processing.
Details
- Title: Subtitle
- Dynamic interactions between visual working memory and saccade target selection
- Creators
- Sebastian Schneegans - Institut für Neuroinformatik, Ruhr-Universität Bochum, Bochum, GermanyJohn P Spencer - Department of Psychology and Delta Center, University of Iowa, IA, USAGregor Schöner - Institut für Neuroinformatik, Ruhr-Universität Bochum, Bochum, GermanySeongmin Hwang - Department of Psychology, University of Iowa, IA, USAAndrew Hollingworth - Department of Psychology, University of Iowa, IA, USA
- Resource Type
- Journal article
- Publication Details
- Journal of vision (Charlottesville, Va.), Vol.14(11), pp.9-9
- Publisher
- The Association for Research in Vision and Ophthalmology
- DOI
- 10.1167/14.11.9
- PMID
- 25228628
- PMCID
- PMC4166143
- ISSN
- 1534-7362
- eISSN
- 1534-7362
- Language
- English
- Date published
- 2014
- Academic Unit
- Psychological and Brain Sciences
- Record Identifier
- 9984213410402771
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