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Related Experiment Video

Updated: Apr 14, 2026

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

Extrapolation occurs in multiple object tracking when eye movements are controlled.

Tina Luu¹, Piers D L Howe

¹School of Psychological Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia.

Attention, Perception & Psychophysics

|April 21, 2015

Summary

This summary is machine-generated.

Observers use extrapolation to track moving objects, especially when paths are predictable. This ability diminishes with increased tracking demands or slower object speeds in multiple object tracking (MOT).

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Area of Science:

Cognitive psychology
Visual perception
Human eye movement analysis

Background:

Debate exists on information used for tracking moving objects.
Previous studies suggested extrapolation, but lacked eye movement control.
Eye movements may influence extrapolation in multiple object tracking (MOT).

Purpose of the Study:

Investigate extrapolation in MOT without confounding eye movements.
Determine if extrapolation persists when fixation is maintained centrally.
Examine the impact of predictability on tracking performance.

Main Methods:

Utilized an eye tracker to ensure central fixation during tracking.
Compared performance in predictable (linear paths) and unpredictable (random direction changes) conditions.
Manipulated tracking load and object speed across experiments.

Main Results:

Observers performed better in predictable than unpredictable conditions for tracking two objects.
Extrapolation effects were reduced with higher tracking loads.
Slower object speeds also decreased the occurrence of extrapolation.

Conclusions:

Extrapolation is employed in multiple object tracking (MOT) when eye movements are controlled.
The extent of extrapolation depends on predictability, tracking load, and object speed.
Findings clarify the role of extrapolation in visual tracking under controlled conditions.