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Related Concept Videos

Understanding Consciousness01:23

Understanding Consciousness

Consciousness can be defined as the state of being aware of and able to think about one's existence, sensations, and surroundings. It encompasses two major components: awareness and arousal. Awareness pertains to the recognition of environmental stimuli and internal states. At the same time, arousal refers to the physiological readiness to engage with these stimuli, which varies significantly between states like sleep and wakefulness.
Sleep, a crucial state, is characterized by reduced physical...
High-Level and Low-Level Awareness01:19

High-Level and Low-Level Awareness

Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
Subconsciousness and No Awareness01:15

Subconsciousness and No Awareness

The concept of subconscious awareness refers to the processing of information below the level of conscious thought, which significantly influences both behaviors and decisions. It is also known as waking subconscious awareness. This complex level of cognition operates without the direct awareness of the individual, facilitating rapid and simultaneous handling of multiple information streams.
An illustrative example of subconscious processing is its role in problem-solving. Often, individuals...
Altered States of Awareness01:06

Altered States of Awareness

Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain that...
Attitudes01:54

Attitudes

Attitude is our evaluation of a person, an idea, or an object. We have attitudes for many things ranging from products that we might pick up in the supermarket to people around the world to political policies. Typically, attitudes are favorable or unfavorable: positive or negative (Eagly & Chaiken, 1993). And, they have three components: an affective component (feelings), a behavioral component (the effect of the attitude on behavior), and a cognitive component (belief and knowledge;...
Perception01:28

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...

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Related Experiment Video

Updated: May 26, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Attention and consciousness: related yet different.

Christof Koch1, Naotsugu Tsuchiya

  • 1Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA. koch@klab.caltech.edu

Trends in Cognitive Sciences
|December 14, 2011
PubMed
Summary

Visual consciousness does not originate in the primary visual cortex. A novel experiment dissociates visual attention from consciousness, challenging previous research findings.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • Understanding the neural basis of visual consciousness is a key challenge in neuroscience.
  • Distinguishing visual attention from visual consciousness is crucial for accurate interpretation of brain activity.

Purpose of the Study:

  • To experimentally dissociate selective visual attention from visual consciousness.
  • To test the hypothesis that visual consciousness arises independently of the primary visual cortex.

Main Methods:

  • Utilized a rare 2x2 experimental design.
  • Employed perceptual imaging techniques to analyze brain activity during visual tasks.

Main Results:

  • The experiment successfully dissociated selective visual attention from visual consciousness.

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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Related Experiment Videos

Last Updated: May 26, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
09:37

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control

Published on: July 5, 2015

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
05:58

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

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  • Findings indicate that neural activity in the primary visual cortex is not the source of visual consciousness.

    • Conclusions:

    • Visual consciousness does not depend on neurons in the primary visual cortex.
    • These results necessitate a reevaluation of numerous previous studies on visual perception and awareness.