@misc{10481/108812,
year = {2026},
month = {2},
url = {https://hdl.handle.net/10481/108812},
abstract = {There is an asymmetry in the ability to process visual information in the left and right visual fields. Extensive
literature has consistently shown that young, healthy human adults exhibit a visuospatial bias towards the left
hemifield (pseudoneglect). This leftward bias has traditionally been demonstrated through horizontal line
bisection tasks in 2D experimental settings. However, as research progressed into 3D space, where lines are
presented far from the observer, the dissipation of the classical leftward bias tended to reverse into a rightward
bias. The precise distances at which the leftward bias, a neutral point, and rightward biases occur remain unclear.
Here, we present a meta-analysis to model how bisection performance changes across 3D space quantitatively.
We identified the boundary conditions where leftward biases reverse into rightward biases and at what distances
this change can be predicted using line bisection. A total of 30 samples (25 studies, 142 bisection-error effects,
n = 720) were included. Overall, the analysis revealed a significant leftward bias within near space, followed by a
rightward bias in far space. Three critical ranges for visuospatial asymmetries across depth were revealed in
young, healthy adults: (1) significant leftward biases up to 48 cm, (2) no reliable leftward/rightward biases from
49 to 87 cm, and (3) significant rightward biases beyond 88 cm. In addition, we revealed significant moderating
effects of participant age (50 + years old), the use of tools to perform bisection, and the control of retinal size
across depth. The findings establish important benchmarks when investigating visuospatial asymmetries and
could inform clinical assessment.},
organization = {European Union’s Horizon 2020 - Marie SkłodowskaCurie Actions (project Nº 101149355)},
publisher = {Elsevier},
keywords = {Line bisection},
keywords = {Pseudoneglect},
keywords = {Peripersonal space},
title = {Hemispheric asymmetry for visual information processing in 3D space},
doi = {10.1016/j.neubiorev.2025.106504},
author = {Britt, Noah and Román-Caballero, Rafael and Lee, Fion and Raghuraman, Shruthi and Sun, Hong-jin},
}