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Related Experiment Video

Updated: Dec 13, 2025

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Evidence of inverted gravity-driven variation in predictive sensorimotor function.

Andrew Isaac Meso^1,2,3, Robert L De Vai³, Ashakee Mahabeer³

¹Neuroimaging Department, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.

The European Journal of Neuroscience

|July 31, 2020

Summary

This summary is machine-generated.

Human eye movements show unique patterns influenced by gravity. Disrupting gravity perception impairs motion tracking, especially in individuals with higher schizotypy traits, revealing insights into predictive brain function.

Keywords:

diagnostics eye movements gravity prediction schizotypy

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Last Updated: Dec 13, 2025

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Area of Science:

Neuroscience
Cognitive Science
Perception

Background:

Human eye movements exhibit unique, handwriting-like patterns.
Implicit knowledge of gravity aids dynamic perception and motion processing.
Individual differences in perception are linked to attention, sensitivity, and experience.

Purpose of the Study:

To investigate the impact of acquired knowledge of gravity on dynamic visual perception.
To examine performance differences in eye-tracking tasks under simulated gravity versus antigravity conditions.
To explore the correlation between individual performance variations and schizotypy traits.

Main Methods:

A projected ball-tracking task was employed with 44 participants.
Participants performed tracking under simulated gravity and atypical antigravity conditions.
Performance was quantified using root-mean-square error (RMSE) and reaction times; schizotypy traits were assessed via questionnaires.

Main Results:

Tracking performance (RMSE) was significantly worse in the antigravity condition.
Participants required approximately 200 ms longer to reach peak performance in the antigravity condition.
Antigravity performance divergence correlated with schizotypy levels, showing a negative relationship with tracking initiation and maintenance.

Conclusions:

Knowledge of gravity significantly improves dynamic prediction and motion processing, especially when acceleration cues are absent.
Violating gravitational expectations via antigravity tracking serves as a diagnostic tool for predictive brain function.
Schizotypy traits are associated with impoverished sensory prediction, impacting dynamic visual-motor tasks.