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

Centroid of a Body: Problem Solving01:03

Centroid of a Body: Problem Solving

2.0K
The centroid of a body is a crucial concept in engineering and physics. Finding the centroid of a body can help determine its stability, its balance point, and even its design. In this context, consider a thin wire bent in the form of a quarter circular arc. Polar coordinates are used to calculate the centroid. The wire is first divided into small differential elements of a length equal to the radius multiplied by the differential angle.
The x-coordinates and y-coordinates of each element's...
2.0K
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

844
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
844
Inertial Frames of Reference01:03

Inertial Frames of Reference

9.9K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
9.9K
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

1.1K
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
1.1K
Non-inertial Frames of Reference01:27

Non-inertial Frames of Reference

8.5K
A reference frame accelerating or decelerating relative to an inertial frame is a non-inertial frame. To help understand this, consider what taking off in an airplane, turning a corner in a car, riding a merry-go-round, and the circular motion of a tropical cyclone all have in common. All these systems are accelerating, decelerating, or rotating relative to the Earth; hence, they all are non-inertial frames. All these systems exhibit inertial forces, which merely seem to arise from motion,...
8.5K
Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

988
In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
988

You might also read

Related Articles

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

Sort by
Same author

An equivalent illuminant analysis of lightness constancy with physical objects and in virtual reality.

Behavior research methods·2025
Same author

Dissecting Bayes: Using influence measures to test normative use of probability density information derived from a sample.

PLoS computational biology·2024
Same author

A comparison of human and GPT-4 use of probabilistic phrases in a coordination game.

Scientific reports·2024
Same author

Lightness constancy in reality, in virtual reality, and on flat-panel displays.

Behavior research methods·2024
Same author

Detecting visual texture patterns in binary sequences through pattern features.

Journal of vision·2023
Same author

Assessing the roles of shape prototypicality and sexual dimorphism in ratings of the trustworthiness of faces.

Scientific reports·2023

Related Experiment Video

Updated: Apr 3, 2026

Decoding Natural Behavior from Neuroethological Embedding
08:00

Decoding Natural Behavior from Neuroethological Embedding

Published on: October 3, 2025

874

Allocentric kin recognition is not affected by facial inversion.

Maria F Dal Martello, Lisa M DeBruine, Laurence T Maloney

    Journal of Vision
    |September 19, 2015
    PubMed
    Summary

    Facial inversion does not affect kin recognition. Judging genetic relatedness from faces appears to use different cues than other facial perception tasks, suggesting unique processing for kin identification.

    Area of Science:

    • Cognitive Psychology
    • Evolutionary Psychology
    • Neuroscience

    Background:

    • Facial perception is typically disrupted by image inversion (e.g., Thatcher illusion).
    • Allocentric kin recognition involves judging genetic relatedness from facial appearance.

    Purpose of the Study:

    • To investigate the effect of facial inversion on allocentric kin recognition.
    • To determine if kin recognition relies on the same perceptual cues as other face judgments.

    Main Methods:

    • Two experiments were conducted using photographs of children and adult women.
    • Participants judged sibling vs. unrelated pairs under upright, horizontally flipped, and 180° rotated conditions.

    Main Results:

    • Facial inversion (flipping or rotation) had no significant effect on kin recognition accuracy.

    More Related Videos

    Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
    10:51

    Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

    Published on: January 15, 2018

    9.0K
    Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
    07:09

    Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior

    Published on: November 14, 2018

    11.7K

    Related Experiment Videos

    Last Updated: Apr 3, 2026

    Decoding Natural Behavior from Neuroethological Embedding
    08:00

    Decoding Natural Behavior from Neuroethological Embedding

    Published on: October 3, 2025

    874
    Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
    10:51

    Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

    Published on: January 15, 2018

    9.0K
    Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
    07:09

    Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior

    Published on: November 14, 2018

    11.7K
  • Kin judgments remained consistent across all orientation conditions.

    • Conclusions:

    • Allocentric kin recognition is robust to facial inversion, unlike most other face perception tasks.
    • Kin recognition likely relies on spatially localized cues, not holistic cues disrupted by inversion.
    • Kin recognition is a distinct ability, not merely a byproduct of general face perception.