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

Conservation of Mass in Moving, Nondeforming Control Volume01:14

Conservation of Mass in Moving, Nondeforming Control Volume

Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Curvilinear Motion: Normal and Tangential Components01:27

Curvilinear Motion: Normal and Tangential Components

When a car traverses a curved road, its motion can be elucidated by breaking it down into tangential and normal components. The car-centric coordinates attached to the vehicle move with it.
The positive direction of the t-axis aligns with the increasing position of the car along the curved path, denoted by the unit vector ut. Simultaneously, the n-axis, perpendicular to the t-axis, dissects the curved path into differential arc segments, each forming the arc of a circle with a radius of...
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
Equations of Motion: Normal and Tangetial Components01:10

Equations of Motion: Normal and Tangetial Components

Describing the motion of a particle along a curvilinear path involves understanding its components in terms of normal and tangential aspects. The normal component aligns with the radial direction of the curve at a specific point, reflecting changes in the trajectory of the velocity vector. In contrast, the tangential component is tangential to the curve at that point and signifies the rate at which speed alters along the path.
Newton's second law of motion is employed to articulate the equation...
Gravitation Between Spherically Symmetric Masses01:14

Gravitation Between Spherically Symmetric Masses

The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...

You might also read

Related Articles

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

Sort by
Same author

Toward the validation of crowdsourced experiments for lightness perception.

PloS one·2024
Same author

Visual fixations during processing of time-compressed audiovisual presentations.

Attention, perception & psychophysics·2024
Same author

An Imagination - Procrastination Link? The Role of Efficacy Beliefs, Visual Imagery, and Affect in Academic Procrastination.

Psychological reports·2023
Same author

Predicting residues involved in anti-DNA autoantibodies with limited neural networks.

Medical & biological engineering & computing·2022
Same author

Mice recognize 3D objects from recalled 2D pictures, support for picture-object equivalence.

Scientific reports·2022
Same author

Commentary on Lin et al.: The importance of valid reference standards in training supervised machine learning classifiers to detect alcohol misuse.

Addiction (Abingdon, England)·2021

Related Experiment Videos

Convexities move because they contain matter.

Elan Barenholtz1

  • 1Department of Psychology, Florida Atlantic University, Boca Raton, Florida 33431, USA. elan.barenholtz@fau.edu

Journal of Vision
|October 2, 2010
PubMed
Summary

Visual processing relies on figure-ground assignment. A new cue, "Convex Motion," shows people prefer convex over concave moving contours, suggesting this visual perception relates to inferred physical properties of objects.

Area of Science:

  • Visual perception
  • Cognitive psychology
  • Computational neuroscience

Background:

  • Figure-ground assignment is crucial for visual processing, enabling object recognition.
  • Existing cues for figure-ground segregation include motion, depth, and occlusion.
  • A dynamic, general cue for figure-ground assignment remains an area of active research.

Purpose of the Study:

  • To introduce and investigate a novel dynamic cue for figure-ground assignment termed "Convex Motion."
  • To determine the influence of contour convexity during dynamic deformation on figure-ground perception.
  • To explore the underlying mechanisms and naturalistic basis of this visual phenomenon.

Main Methods:

  • Six experiments were conducted using dynamically deforming visual stimuli.

Related Experiment Videos

  • Participants were tasked with assigning figure and ground to contours exhibiting convex and concave motion.
  • Control experiments assessed the roles of fixation, attention, and motion type (deformational vs. rigid).

    • Main Results:

    • A strong preference was observed for assigning figure status to convex contour segments over concave ones.
    • This preference persisted across different types of deformational motion and was independent of fixation or attentional shifts.
    • A reduced bias was found for rigid motion, and the effect was dependent on the global motion of the contour.

    Conclusions:

    • "Convex Motion" serves as a significant, general cue in figure-ground assignment.
    • The preference for convexity likely stems from naturalistic motion patterns where convex shapes often represent physical matter.
    • This finding underscores the link between visual perception of shape, figure-ground segregation, and the inference of object properties.