Popescu, Diana Madalina (2022) Color categories and visual working memory. Research Project 1 (minor thesis), Behavioural and Cognitive Neurosciences.
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Abstract
Representations in Visual Working Memory (VWM) are thought to guide visual attention – a phenomenon known as memory-driven attentional capture. Whether attention is automatically biased towards (distractor) objects that match the VWM content is yet unclear. Our main objective was to test whether attentional capture is memory-driven, and how this interaction is modulated by 1) the match/nonmatch of distractors with the VWM content and 2) the storage format of visual information – continuous (detailed, sensory representations)/categorical. In addition, we aimed to replicate evidence that pupils are larger while maintaining continuous information in VWM due to being more effortful. In doing so, we collected independent measures of behavior (reaction times) and pupil size in two studies. Results from the behavioral study showed no evidence that attention gets automatically captured by memory-matching distractors; rather, the VWM content was used strategically to benefit target selection in visual search. In the pupil study, memory-matching probes drove a stronger visual response than non- matching probes, yet the initial stronger constriction made it unclear whether attention got captured later. The storage format did not modulate the memory-driven capture effect, yet it strongly affected the visual response during maintenance: The pupils were smaller (instead of larger as predicted) while maintaining information in continuous representations, likely reflecting a sensory response
| Item Type: | Thesis (Research Project 1 (minor thesis)) |
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| Supervisor name: | Mathot, S. and Wilschut, T.J. |
| Degree programme: | Behavioural and Cognitive Neurosciences |
| Thesis type: | Research Project 1 (minor thesis) |
| Language: | English |
| Date Deposited: | 23 Aug 2022 10:48 |
| Last Modified: | 23 Aug 2022 10:48 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/28473 |
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