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Perception

Perception

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...

Gestalt Principles of Perception

Gestalt Principles of Perception

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...

Understanding the Self

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The self is a central aspect of human identity, encompassing an individual’s beliefs, emotions, perceptions, and experiences. It is a cognitive and psychological construct that enables individuals to interpret their traits and behaviors, influencing how they perceive themselves and interact with the world. While personality consists of stable and enduring characteristics, the self is shaped by self-perception and social experiences. This distinction highlights the dynamic nature of the self,...

The Sense of Self: Reflected Self-Appraisal and Social Comparison

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According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...

Factors Affecting Perception

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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...

Gestalt Psychology

Gestalt Psychology

Gestalt psychology, founded by Max Wertheimer, Kurt Koffka, and Wolfgang Kohler, emphasizes the importance of understanding perception as an organized whole. Developed as a counter to Wilhelm Wundt's structuralism, this approach posits that our perceptions are more than just the sum of sensory parts; they are comprehensive wholes where the relationships between parts define the perception. The principle "The whole is greater than the sum of its parts" encapsulates this view, illustrating how...

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Related Experiment Video

Updated: May 20, 2026

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

Published on: October 27, 2016

Perception and self-organized instability.

Karl Friston¹, Michael Breakspear, Gustavo Deco

¹The Wellcome Trust Centre for Neuroimaging, University College London London, UK.

Frontiers in Computational Neuroscience

|July 12, 2012

Summary

This summary is machine-generated.

Brain dynamics enable perception through self-organized instabilities. These instabilities facilitate perceptual transitions and conscious ignition, allowing sensitive responses to sensory input.

Keywords:

bayesian inference critical slowing free-energy generalized synchronization self-organization

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Last Updated: May 20, 2026

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine

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Published on: October 27, 2016

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

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Observing the Transformation of Bodily Self-consciousness in the Squeeze-machine Experiment

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Published on: March 8, 2019

Area of Science:

Neuroscience
Computational Neuroscience
Cognitive Science

Background:

Perception involves state-dependent brain dynamics.
Bayes-optimal perception relies on self-organized instabilities for transitions.
Perceptual transitions are linked to conscious ignition and dynamical instabilities like chaotic itinerancy and self-organized criticality.

Purpose of the Study:

To explore the formal basis of self-organized instabilities in Bayes-optimal perception.
To investigate the role of dynamical instabilities in perceptual transitions and conscious ignition.
To formulate and test a conjecture on self-organized instability in perception.

Main Methods:

Dynamical formulation of perception as approximate Bayesian inference.
Variational free energy minimization principles.
Neuronal (numerical) simulations of perceptual categorization.

Main Results:

Perception inherently induces dynamical instabilities (critical slowing).
These instabilities enable sensitive responses to sensory perturbations.
The study provides a formal conjecture and simulation-based evidence for self-organized instability in perception.

Conclusions:

Self-organized instabilities are crucial for perceptual transitions and Bayes-optimal perception.
Dynamical instabilities, including critical slowing, are fundamental to how the brain processes sensory information.
The findings support a dynamical systems approach to understanding perception and consciousness.