|
How Voluntary and Involuntary Attention Differentially Shape Perception| title | How Voluntary and Involuntary Attention Differentially Shape Perception |
|---|
| start_date | 2024/01/30 |
|---|
| schedule | 13h |
|---|
| online | no |
|---|
| location_info | Room 500 & Zoom |
|---|
| summary | Visual attention is essential for visual perception; it enables us to selectively process information across space, visual dimensions, and time. In this talk, I focus on two types of covert spatial attention: Endogenous attention, which is voluntarily deployed and sustained, and exogenous attention, which is involuntarily deployed fast and transiently. I illustrate how these two types of attention differentially modulate visual perception. I highlight findings from: (1) Psychophysical experiments investigating their effects on performance and their corresponding featural representations. (2) An image-computable model, which require separate operating regimes across visual detail (spatial frequency) to explain how they differentially alter visual perception; (3) Neuroimaging (fMRI) experiments differentiating their effects in occipital cortex. (4) Neurostimulation experiments with transcranial magnetic stimulation (TMS) establishing differential causal roles of the occipital cortex (V1/V2) for exogenous attention and of the frontal cortex (right frontal eye-field) for endogenous attention. Together these studies reveal a computational dissociation and a critical role of different brain areas to explain how endogenous and exogenous differentially attention alter the processing of basic visual dimensions and shape perception. |
|---|
| responsibles | Esposito |
|---|
Workflow history| from state (1) | to state | comment | date |
|---|
| submitted | published | | 2024/01/22 13:34 UTC |
| |
|