1 / 4

Unconscious processing of visual saliency

Unconscious processing of visual saliency. Ryota Kanai, Vincent Walsh. Institute of Cognitive Neuroscience and Department of Psychology. University College London. The goal: disentangle functions of attention areas (FEF and IPS). Motivation:

gavivi
Télécharger la présentation

Unconscious processing of visual saliency

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unconscious processing of visual saliency Ryota Kanai, Vincent Walsh Institute of Cognitive Neuroscience and Department of Psychology University College London

  2. The goal: disentangle functions of attention areas (FEF and IPS) Motivation: Attention related areas show similar responses to attentional tasks. We would like to know how FEF and IPS play functionally distinct roles. Hypothesis: IPS is involved in bottom-up saliency computation, and FEF is involved in forming task set (template). Difficulty (part of the hypothesis): Task set is also triggered by bottom-up events. So FEF appears to be stimulus driven (e.g. responses to saliency). So usually FEF and IPS behave in a similar way.

  3. How do we tackle the problem? We look at cortical responses to two types of attention capturing stimuli outside awareness. 1. Present an array of stimuli with a pop-out target to the suppressed eye. Right Eye Left Eye + + The goal is to see lateralized responses to the pop-out target in FEF and IPS

  4. Proposed fMRI study Conditions to compare: Target in left visual field Target in right visual field Target absent Event-related design e.g.) 6min scan (45 trials) x 4 visible + 4 invisible runs LV abs RV LV Each stimulus 3 sec Inter trial interval: 3~8 sec

More Related