Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Masking and Demasking Agents

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...

Effects of feedback

Effects of feedback

Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...

Parallel Processing

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...

Facial Feedback Hypothesis

Facial Feedback Hypothesis

Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...

Visual System

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...

Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

You might also read

Related Articles

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

Sort by

Same author

Microsaccade Dynamics Enhance Nodule Detection and Discriminate Reader Expertise Levels During Chest Radiography.

Research square·2026

Same author

Fixational eye movements: Implications for applied and clinical assessments.

Handbook of clinical neurology·2026

Same author

Assessing the role of magician patter on deception in the Three-Card Monte.

Scientific reports·2026

Same author

A case study of sudden-onset cortically mediated visual impairments in a 12-year-old.

Research square·2025

Same author

Friends Can Make Things Very Scary: Haunted houses reveal how friends and strangers shape our fears.

Scientific American·2024

Same author

Author Correction: Minimal reporting guideline for research involving eye tracking (2023 edition).

Behavior research methods·2024

Search research articles

Related Experiment Video

Updated: Jun 12, 2026

Testing Tactile Masking between the Forearms

Testing Tactile Masking between the Forearms

Published on: February 10, 2016

The role of feedback in visual masking and visual processing.

Stephen L Macknik¹, Susana Martinez-Conde

¹Barrow Neurological Institute, Phoenix, USA.

Advances in Cognitive Psychology

|June 3, 2010

Summary

Feedback mechanisms have limited roles in visual masking and brain function. A feedforward model is proposed, suggesting feedback

Keywords:

attention awareness consciousness electrophysiology fMRI feedback humans masking metacontrast monkeys optical imaging paracontrast psychophysics standing wave vision visual

More Related Videos

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Related Experiment Videos

Last Updated: Jun 12, 2026

Testing Tactile Masking between the Forearms

Testing Tactile Masking between the Forearms

Published on: February 10, 2016

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

Published on: March 18, 2019

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Applying Incongruent Visual-Tactile Stimuli during Object Transfer with Vibro-Tactile Feedback

Published on: May 23, 2019

Area of Science:

Neuroscience
Cognitive Science
Visual Processing

Background:

Feedback mechanisms are debated for their role in visual masking.
Understanding visual processing requires examining feedback and feedforward pathways.

Purpose of the Study:

To review the evidence for and against feedback in visual masking.
To propose a feedforward model for visual masking.
To hypothesize the function of feedback in visual processing and attention.

Main Methods:

Literature review of feedback mechanisms in visual masking.
Analysis of anatomical and physiological data on feedback connections.
Comparison of visual masking with other illusions like binocular rivalry.

Main Results:

Constraints on feedback mechanisms limit their role in visual masking and general brain functions.
A feedforward model of visual masking is proposed.
The high ratio of feedback to feedforward connections may serve attentional modulation.

Conclusions:

Feedback's role in visual masking is constrained.
A feedforward model offers an alternative explanation.
New neurophysiological standards are needed to identify neural correlates of awareness.