The functional role of spatial anisotropies in ensemble perception.

ABSTRACT:

Background

The human brain can rapidly represent sets of similar stimuli by their ensemble summary statistics, like the average orientation or size. Classic models assume that ensemble statistics are computed by integrating all elements with equal weight. Challenging this view, here, we show that ensemble statistics are estimated by combining parafoveal and foveal statistics in proportion to their reliability. In a series of experiments, observers reproduced the average orientation of an ensemble of stimuli under varying levels of visual uncertainty.

Results

Ensemble statistics were affected by multiple spatial biases, in particular, a strong and persistent bias towards the center of the visual field. This bias, evident in the majority of subjects and in all experiments, sca

SUBMITTER: Tiurina NA 

PROVIDER: S-EPMC10845794 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature