MARCS Insight Series: Using AI-generated synthetic images to drive object responses in the human brain

Event Name MARCS Insight Series: Using AI-generated synthetic images to drive object responses in the human brain
Start Date 8th Aug 2023 11:00 am
End Date 8th Aug 2023 12:00 pm
Duration 1 hour
Description

MARCS INSIGHTS SERIES – Tuesdays at 11am

All welcome! To receive the zoom link and be added to the mailing list, please email marcs@westernsydney.edu.au.

Speaker

Dr Tijl Grootswagers

Interest Group

Cognitive Neuroscience

Abstract

The human brain effortlessly categorises objects at different levels of abstraction. An important question for our understanding of visual processing is to what extent this categorisation capacity is underpinned or driven by mid-level visual features (e.g., shapes and texture) that co-vary across different categories (e.g., animals or vehicles). Here we addressed this by training two independent Generative Adversarial Networks to produce two categories of novel synthetic stimuli that match the low- and mid-level visual features of either animate or inanimate real objects. Crucially, where these synthetic stimuli have the low- and mid-level visual properties of real objects, they have no associated high-level category labels. We recorded electro-encephalography and behavioural categorisation responses to the synthetic stimuli along with their real counterparts in a na├»ve participant sample. Results revealed animacy-like neural signatures for the synthetic objects that emerged earlier than neural signatures distinguishing the same stimuli from images of real objects. The temporal dynamics of neural responses suggest that successful animacy categorisation of our novel synthetic images was driven by their mid-level visual features. These findings contribute to a precise picture of how image statistics support successful object recognition.

Location

Level 4 Seminar Room, Innovation Quarter, 160 Hawkesbury Road, Sydney, NSW 2145, Australia

Join Remotely

To receive a link to virtually attend please register by emailing marcs@westernsydney.edu.au