Astle, Duncan E, Scerif, Gaia, Kuo, Bo-Cheng and Nobre, Anna C (2009) Spatial selection of features within perceived and remembered objects. Frontiers in Human Neuroscience, 3
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Our representation of the visual world can be modulated by spatially specific attentional biases that depend flexibly on task goals. We compared searching for task-relevant features in perceived versus remembered objects. When searching perceptual input, selected task-relevant and suppressed task-irrelevant features elicited contrasting spatiotopic ERP effects, despite them being perceptually identical. This was also true when participants searched a memory array, suggesting that memory had retained the spatial organization of the original perceptual input and that this representation could be modulated in a spatially specific fashion. However, task-relevant selection and task-irrelevant suppression effects were of the opposite polarity when searching remembered compared to perceived objects. We suggest that this surprising result stems from the nature of feature- and object-based representations when stored in visual short-term memory. When stored, features are integrated into objects, meaning that the spatially specific selection mechanisms must operate upon objects rather than specific feature-level representations.
This is a Submitted version This version's date is: 2009 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/9f0e4848-6335-a4d3-2fa4-0f2a496350a4/1/
Deposited by Research Information System (atira) on 11-Jun-2012 in Royal Holloway Research Online.Last modified on 11-Jun-2012