Related Experiment Video
Updated: Jan 26, 2026
10:41
Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content
Published on: May 26, 2018
7.3K
Group formation and cohesion of active particles with visual perception-dependent motility
François A Lavergne1, Hugo Wendehenne1, Tobias Bäuerle1
1Department of Physics, University of Konstanz, 78464 Konstanz, Germany.
Science (New York, N.Y.)
|April 6, 2019
Summary
Simple changes in movement, driven by seeing others, can cause living systems to form cohesive groups. This motility-induced cohesion principle applies to biological self-organization and designing autonomous systems.
Area of Science:
- Collective behavior
- Active matter physics
- Self-organization
Background:
- Group formation relies on complex interactions like repulsion, alignment, and attraction.
- Understanding the fundamental mechanisms driving collective behavior is crucial for both biology and robotics.
Purpose of the Study:
- To investigate if changes in individual motility, based on visual perception of peers, can induce group formation and cohesion.
- To test a novel motility-induced cohesion mechanism in a physical system.
Main Methods:
- Utilized a real system of active particles with motilities controlled by an external feedback loop.
- Manipulated the field of view (narrow vs. wide) and response threshold to observe group dynamics.
Main Results:
- A simple change in motility in response to visual cues led to cohesive group formation without active reorientation in narrow fields of view.
- Lowering the response threshold facilitated cohesion even with wider fields of view.
Conclusions:
- Motility-induced cohesion is a viable mechanism for self-organization in living systems.
- This principle can inform the design of robust, scalable autonomous systems capable of collective behavior.
Related Concept Videos
01:07Cohesion
58.6K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
58.6K
01:16Precipitate Formation and Particle Size Control
6.3K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
6.3K
01:15Subliminal Perception
782
Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
782
01:25Factors Affecting Perception
2.7K
Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
An illustrative example of a perceptual set is the scenario where an airline pilot told...
2.7K
01:28Perception
1.1K
Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
1.1K
01:21Gestalt Principles of Perception
1.1K
Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
1.1K