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Related Concept Videos

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Cognitive load in switching between egocentric and allocentric spatial frames of reference: a pupillometry study.

Renato Orti1, Tina Iachini2, Eleonora D'Agostino2

  • 1Laboratory of Cognitive Science and Immersive Virtual Reality, CS-IVR, Department of Psychology, University of Campania L. Vanvitelli, Viale Ellittico, 31, 81100, Caserta, Italy. renato.orti@unicampania.it.

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|July 21, 2025
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Summary
This summary is machine-generated.

Switching between egocentric and allocentric spatial frames requires cognitive effort. This study found that initiating spatial tasks from an allocentric (object-centered) frame, rather than an egocentric (body-centered) frame, consistently increases cognitive load.

Keywords:
Cognitive loadEgocentric allocentric frames of referencePupillometryVisuo-spatial switching processes

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Spatial Cognition

Background:

  • Humans frequently switch between egocentric (body-centered) and allocentric (object-centered) spatial reference frames.
  • Previous research suggests switching from allocentric to egocentric frames is more difficult than the reverse.

Purpose of the Study:

  • To investigate the cognitive load associated with switching between egocentric and allocentric spatial frames.
  • To clarify the asymmetry in switching difficulty between reference frames using cognitive pupillometry.

Main Methods:

  • Participants performed a visuo-spatial memory task involving egocentric and allocentric judgments.
  • Cognitive load was measured by analyzing pupil dilation variations using eye-tracking.
  • Task conditions included non-switching (only-egocentric, only-allocentric) and switching (from-ego-to-allo, from-allo-to-ego) frames.

Main Results:

  • Pupil dilation was significantly larger when switching from allocentric to egocentric frames compared to the reverse.
  • Non-switching conditions also showed greater pupil dilation when starting from an allocentric frame versus an egocentric frame.
  • These findings indicate a higher cognitive load when initiating spatial processing from an allocentric representation.

Conclusions:

  • The initial reference frame adopted significantly impacts cognitive load during spatial processing and switching.
  • Starting with an allocentric representation imposes a greater cognitive burden than starting with an egocentric one.
  • This initial frame bias appears to influence subsequent spatial processing and switching efficiency.