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Related Experiment Video

Updated: May 12, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Object-based saccadic selection during scene perception: evidence from viewing position effects.

Maciej Pajak1, Antje Nuthmann

  • 1Neuroinformatics Doctoral Training Centre, Institute for Adaptive and Neural Computation, School of Informatics, University of Edinburgh, UK.

Journal of Vision
|April 3, 2013
PubMed
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Eye movements in natural scenes show that where you first look on an object (preferred viewing location) is influenced by object size and distance. Initial fixation position did not affect refixation likelihood for objects.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Objects are considered key units for guiding eye movements (saccades) and attention during scene perception.
  • Previous research identified a preferred viewing location (PVL) near the center of objects.

Purpose of the Study:

  • To investigate how object size and launch site distance influence the preferred viewing location (PVL) within objects.
  • To examine the effect of initial within-object fixation position on subsequent eye movement behavior, specifically refixation patterns and fixation durations.

Main Methods:

  • Analysis of eye-tracking data from participants viewing natural scenes.
  • Quantification of fixation locations within objects relative to object center and edges.
  • Examination of relationships between initial fixation position, object properties, and subsequent saccade behavior.

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Related Experiment Videos

Last Updated: May 12, 2026

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity
06:46

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

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Main Results:

  • The preferred viewing location (PVL) within objects is modulated by object size and the distance from the previous fixation (launch site distance).
  • Unexpectedly, initial fixation position on an object did not influence the probability of refixating that object.
  • An inverted-optimal viewing (IOVP) effect was observed for large objects, with longer fixation durations at the object center compared to the edges.

Conclusions:

  • Findings support the hypothesis of object-based saccade targeting in real-world scene perception.
  • The lack of a refixation optimal viewing position (OVP) suggests refixations may serve purposes beyond information acquisition.
  • Object size influences fixation duration patterns, with central fixations being longer for larger objects.