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Related Experiment Video

Updated: Jun 12, 2026

Using an Automated 3D-tracking System to Record Individual and Shoals of Adult Zebrafish
14:03

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Published on: December 5, 2013

Tracking multiple objects is limited only by object spacing, not by speed, time, or capacity.

S L Franconeri1, S V Jonathan, J M Scimeca

  • 1Northwestern University, Department of Psychology, 2029 Sheridan Rd., Evanston, IL 60208, USA. franconeri@northwestern.edu

Psychological Science
|June 11, 2010
PubMed
Summary
This summary is machine-generated.

Object spacing, not speed or time, limits multiple-object tracking (MOT). Maintaining constant object spacing allows for unlimited tracking capacity at single-object speeds.

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Area of Science:

  • Cognitive psychology
  • Visual attention research

Background:

  • Humans possess selective attention to track multiple moving objects.
  • Multiple-object tracking (MOT) performance is constrained by object number, speed, and proximity.

Purpose of the Study:

  • To investigate the primary limiting factors in multiple-object tracking.
  • To determine if object spacing is the root cause of MOT performance constraints.

Main Methods:

  • Two experiments were conducted to test the effect of object spacing, speed, and tracking time.
  • Object spacing distribution was held constant while speed and time varied.

Main Results:

  • Tracking performance remained unaffected by significant changes in object speed and tracking time when object spacing was constant.
  • Evidence suggests object spacing is the critical determinant of MOT capacity.

Conclusions:

  • Object spacing is the fundamental limitation in multiple-object tracking.
  • Removing spacing constraints could enable unlimited object tracking at single-object speeds.