Related Experiment Video
Updated: Jun 29, 2026
07:09
Gaze in Action: Head-mounted Eye Tracking of Children's Dynamic Visual Attention During Naturalistic Behavior
Published on: November 14, 2018
Integrated global motion influences smooth pursuit in infants
Olga Kochukhova1, Kerstin Rosander
1Department of Psychology, Uppsala University, Uppsala, Sweden. olga.kochukhova@psyk.uu.se
Journal of Vision
|October 4, 2008
Summary
Nine-month-old infants, but not 5-month-olds, can integrate visual motion segments to guide smooth pursuit eye movements (SP). This ability, crucial for perceiving global motion, develops by nine months of age.
Area of Science:
- Developmental Psychology
- Cognitive Neuroscience
- Ophthalmology
Background:
- Smooth pursuit eye movements (SP) are essential for tracking moving objects.
- Perceiving global motion requires integrating visual information from object segments.
- Understanding the developmental trajectory of motion perception in infants is key.
Purpose of the Study:
- To investigate infants' ability to use perceived global motion for smooth pursuit (SP).
- To examine the influence of occluder visibility on motion integration and SP.
- To determine the age at which infants develop adult-like motion integration for SP.
Main Methods:
- Studied SP in 5-month-olds, 9-month-olds, and adults.
- Used a horizontally oscillating rhombus behind visible and invisible occluders.
- Analyzed eye movements to assess horizontal SP and integration of motion segments.
Main Results:
- Adults and 9-month-olds showed significantly more horizontal SP with visible occluders.
- 5-month-olds did not demonstrate improved horizontal SP in the visible occluder condition.
- Both infants and adults primarily used vertical SP when occluders were invisible.
Conclusions:
- The capacity to integrate moving fragments into global motion for SP develops by 9 months.
- Visible occluders facilitate global motion perception and SP in older infants and adults.
- This study highlights a critical developmental milestone in infant visual perception.
More Related Videos
06:07Exploring Infant Sensitivity to Visual Language using Eye Tracking and the Preferential Looking Paradigm
Published on: May 15, 2019
07:24Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
Published on: August 22, 2025
Related Concept Videos
01:24Absolute Motion Analysis- General Plane Motion
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the drone...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the drone...
01:23Curvilinear Motion: Rectangular Components
Curvilinear motion characterizes the movement of a particle or object along a curved path, notably evident when envisioning a car navigating a winding road. If the car starts at point A, its position vector is established within a fixed frame of reference, where the ratio of the position vector to its magnitude signifies the unit vector pointing in the position vector's direction.
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the time...
As the car advances, its position evolves over time. Quantifying the car's velocity involves computing the time...
01:25Relative Motion Analysis using Rotating Axes
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 instrumental in...
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 instrumental in...
01:24Relative Motion Analysis - Velocity
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
01:24Gyroscope: Precession
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
01:05Mechanism of Ciliary Motion
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...