Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Depth Perception and Spatial Vision

Depth Perception and Spatial Vision

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.

Position and Displacement

Position and Displacement

The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...

Position and Displacement

Position and Displacement

The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...

Lines in Space

Lines in Space

In three-dimensional analytic geometry, a line can be fully described using vector equations when both a point on the line and its direction are known. This approach has practical applications in fields such as engineering and surveying, where precise spatial modeling is essential. For instance, a laser beam from a surveying instrument directed across a construction site can be modeled mathematically as a line using vectors.Let the laser beam originate from a known point P₀, represented by the...

Position and Displacement Vectors

Position and Displacement Vectors

To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...

Position and Displacement Vectors

Position and Displacement Vectors

To describe the motion of an object, one should first be able to describe its position (where it is at any particular time). More precisely, the position needs to be specified relative to a convenient frame of reference. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference to describe the position of an object in relation to stationary objects on Earth.
Further, several important kinds of...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Assessing Pupil Light Reflex Metrics in Glaucoma: Insights from a Systematic Review and Meta-Analysis.

Ophthalmology science·2026

Same author

Assessment of visual contrast sensitivity in biotoxin-exposed individuals using four testing methods.

Annals of medicine·2026

Same author

Saccadic eye movements in amblyopia: a systematic review and meta-analysis.

Clinical & experimental optometry·2026

Same author

Establishing the operating conditions of 'Ocula AI' in capturing the pupillary light reflex.

Clinical & experimental optometry·2025

Same author

A pupillary and eye movement investigation of functional deficits in multiple object tracking following mild traumatic brain injury.

Journal of vision·2025

Same author

Choroidal vascularity index is independent of ocular and image-based factors in healthy eyes: a systematic review and meta-analysis.

Scientific reports·2025

Search research articles

Related Experiment Video

Updated: Jul 19, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

Apparent position in depth of stationary moving three-dimensional objects.

Sum Yin Tsui¹, Sieu K Khuu, Anthony Hayes

¹Department of Psychology, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China. icetsui@graduate.hku.hk

Vision Research

|October 31, 2006

Summary

Motion signals in 3D objects can alter perceived depth position. Movement towards an observer makes objects appear closer, while movement away makes them seem farther, affecting spatial perception.

More Related Videos

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Related Experiment Videos

Last Updated: Jul 19, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

Published on: December 3, 2013

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Three-Dimensional Mapping of the Rotation of Interactive Virtual Objects with Eye-Tracking Data

Published on: October 18, 2024

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

Published on: December 4, 2013

Area of Science:

Visual perception
Depth perception
Motion perception

Background:

Motion within a 2D plane shifts apparent object position.
The effect of motion in depth on 3D object position perception is less understood.

Purpose of the Study:

To investigate if motion in depth of local elements within a 3D object causes an analogous apparent position shift.
To determine the relationship between dot speed and the magnitude of the perceived depth shift.

Main Methods:

A transparent 3D cylinder stimulus composed of moving dots was used.
Observers judged the perceived near and far positions of the cylinder ends.
Dot speed and direction (towards/away from observer) were manipulated.

Main Results:

Dots moving towards the observer caused the cylinder ends to appear closer in depth.
Dots moving away from the observer caused the cylinder ends to appear farther.
The magnitude of the apparent position shift increased with dot speed.

Conclusions:

Motion signals in depth can induce misperceptions of an object's spatial position.
This depth misperception is analogous to 2D motion-induced position shifts.
Random or bidirectional motion in depth significantly reduced or abolished these positional shifts.