Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Uniform Circular Motion01:14

Uniform Circular Motion

22.8K
Uniform circular motion is a specific type of motion in which an object travels in a circle with a constant speed. For example, any point on a propeller spinning at a constant rate is undergoing uniform circular motion. The second, minute, and hour hands of a watch also undergo uniform circular motion. It is hard to believe that points on these rotating objects are actually accelerating, even though the rotation rate is constant. To understand this, we must analyze the motion in terms of...
22.8K
Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

3.6K
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
3.6K
Weightlessness01:01

Weightlessness

7.2K
When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
7.2K
Aliasing01:18

Aliasing

744
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
744
Non-uniform Circular Motion01:22

Non-uniform Circular Motion

10.1K
In uniform circular motion, the particle executing circular motion has a constant speed, and the circle is at a fixed radius. However, not all circular motion occurs at a constant speed. A particle can travel in a circle and speed up or slow down, showing an acceleration in the direction of motion. In that case, the motion is called non-uniform circular motion, and an additional acceleration is introduced, which is in the direction tangential to the circle. 
For example, such...
10.1K
First Pass Effect01:12

First Pass Effect

10.4K
Presystemic elimination, or the first-pass effect, is the metabolism of drugs that reduces their effective concentration at the site of action. Apart from the first-pass effect, the systemic bioavailability of the drug is also reduced by other factors, including incomplete absorption or chemical degradation of drugs.
Depending on the route of administration, drugs can be metabolized in the liver, intestine, lungs, and vasculature. Orally administered drugs are first absorbed through the...
10.4K

You might also read

Related Articles

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

Sort by
Same author

Relationships among lightness illusions uncovered by analyses of individual differences.

Journal of vision·2025
Same author

Separation of luminance and contrast modulation in steady-state visual evoked potentials.

Vision research·2025
Same author

(Mis)estimation of the modal number of desired sexual partners.

PloS one·2024
Same author

The Perpetual Diamond: Contrast Reversals Along Thin Edges Create the Appearance of Motion in Objects.

i-Perception·2022
Same author

Using a variant of the optomotor response as a visual defect detection assay in zebrafish.

Journal of biological methods·2021
Same author

Helix rotation: luminance contrast controls the shift from two-dimensional to three-dimensional perception.

Journal of the Optical Society of America. A, Optics, image science, and vision·2020
Same journal

Pseudo-slimy: A novel phenomenon to evoke stickiness perception.

i-Perception·2026
Same journal

Predictive visual uncertainty around moving trajectories influences causality judgments in launching displays.

i-Perception·2026
Same journal

Light and shape in the work of Robert Fones.

i-Perception·2026
Same journal

Sensorimotor numerosity uniquely supports arithmetic development in children.

i-Perception·2026
Same journal

In praise of anaglyphs.

i-Perception·2026
Same journal

Is number a primary perceptual attribute?

i-Perception·2026
See all related articles

Related Experiment Video

Updated: Mar 14, 2026

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
09:04

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

Published on: January 14, 2020

10.4K

The Star Wars Scroll Illusion.

Arthur G Shapiro1

  • 1Department of Psychology, Collaborative for Applied Perceptual Research & Innovation (CAPRI), American University, Washington, D.C., USA.

I-Perception
|September 21, 2016
PubMed
Summary
This summary is machine-generated.

The Star Wars Scroll Illusion demonstrates how visual perception conflicts with physical reality. This dynamic illusion shows parallel lines appearing to diverge due to perspective, impacting our understanding of visual perception.

Keywords:
3D perceptionAlderaanLeaning Tower IllusionStar Warsillusionperspective

More Related Videos

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

13.9K
How to Create and Use Binocular Rivalry
14:34

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

77.0K

Related Experiment Videos

Last Updated: Mar 14, 2026

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
09:04

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

Published on: January 14, 2020

10.4K
Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation
06:53

Creating Virtual-hand and Virtual-face Illusions to Investigate Self-representation

Published on: March 1, 2017

13.9K
How to Create and Use Binocular Rivalry
14:34

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

77.0K

Area of Science:

  • Visual perception
  • Geometric illusions
  • Psychophysics

Background:

  • The Leaning Tower Illusion demonstrates how perspective affects the perceived orientation of parallel lines.
  • Dynamic visual illusions offer unique insights into perceptual mechanisms.

Purpose of the Study:

  • To introduce and analyze the Star Wars Scroll Illusion, a novel dynamic visual illusion.
  • To investigate the interplay between physical geometry and perceived direction in visual stimuli.
  • To compare the strength of the Scroll Illusion with the Leaning Tower Illusion.

Main Methods:

  • Presentation of visual stimuli featuring Star Wars-like scrolling text with controlled vanishing points.
  • Systematic variation of perspective and rotation angles to assess illusion strength.
  • Analysis of the linear relationship between rotation angle and illusion magnitude.

Main Results:

  • The Star Wars Scroll Illusion creates a compelling perception of non-parallel movement for physically parallel lines.
  • Illusion strength is directly proportional to the angle of rotation into three-dimensional space.
  • The Scroll Illusion is more potent than the Leaning Tower Illusion at rotation angles between 35° and 90°.
  • Perceptual effects are independent of the motion of the scrolling text itself.

Conclusions:

  • The Scroll Illusion effectively highlights the conflict between 2D visual cues and 3D spatial interpretation.
  • Perspective and geometric configuration are critical factors in the perception of parallel motion.
  • The illusion's strength is modulated by the degree of simulated depth, not by motion per se.