Clutter does not affect the spatial tuning of * category representations in human object-selective cortex *
Natural vision is frequently impaired when the visual field is crowded with multiple competing objects. One common interpretation of this clutter interference is that large receptive fields in high-level visual cortex make it hard to separate objects from their surround. This view predicts less interference for spatially localized representations; therefore, classifiers trained under clutter…
In a recent study, researchers investigated how clutter impacts the spatial tuning of object category representations in the human brain. They found that while clutter generally reduces the accuracy of category decoding, it does not necessarily lead to more localized spatial representations in the brain. This challenges the prevailing theory that large receptive fields in high-level visual cortex make it difficult to distinguish objects from their surroundings.
The study utilized functional magnetic resonance imaging (fMRI) to measure participants' brain signals while they viewed objects either alone or within cluttered arrays. Despite the interference caused by clutter, the classifiers trained directly on cluttered displays did not demonstrate spatial localization. Instead, they showed robust generalization across different spatial positions, similar to classifiers trained on objects presented in isolation.
This finding suggests that clutter's effects on spatial tuning may not be as pronounced as previously thought, and that the brain can effectively adapt to crowded visual environments without compromising object categorization abilities.
Written by urgent.news from bioRxiv's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
