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Feature-based attention

Feature-based attention. Feature-based attention. Receptive Field. Attended dots. Global Spread: Neurophysiology. Neural responses are modulated by features of distant attended stimuli (e.g., Treue & Martinez-Trujillo, 2004; Saenz et al, 2002; Boynton & Serences, 2007).

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Feature-based attention

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  1. Feature-based attention

  2. Feature-based attention

  3. Receptive Field Attended dots Global Spread: Neurophysiology • Neural responses are modulated by features of distant attended stimuli (e.g., Treue & Martinez-Trujillo, 2004; Saenz et al, 2002; Boynton & Serences, 2007) • Neurons that prefer the attended feature value are ‘boosted’ across the visual field, even at task-irrelevant locations

  4. Some studies have suggested that location has priority over other features in visual selection. No direct comparison between spatial and feature-based attention due to differences and tasks employed

  5. With identical stimuli and tasks: Spatial attention affects the selection process earlier than feature-based attention Given sufficient time between the cue and target, feature-based attention can be as effective as spatial attention Liu, Stevens & Carrasco, Vis.Res. 07

  6. Neural population response Equivalent noise curves

  7. External noise with global motion

  8. Sequence of events in a single trial

  9. Feature-based attention at a peripheral location

  10. Attentional filters gain= 1.77 -1 gain= 1.44 slope=.0032 deg

  11. How attention modulates population response Ling, Liu & Carrasco, Vis Res 09

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