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Related Concept Videos

Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
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Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
13:00

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Published on: January 23, 2017

Does valence in the visual domain influence the spatial attention after auditory deviants? Exploratory data.

Lisa Schock1, Saurabh Bhavsar, Liliana R Demenescu

  • 1Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, RWTH Aachen University Aachen, Germany ; Interdisciplinary Centre for Clinical Research, Medical School, RWTH Aachen University Aachen, Germany ; Jülich-Aachen Research Alliance-Translational Brain Medicine Jülich, Aachen, Germany.

Frontiers in Behavioral Neuroscience
|February 21, 2013
PubMed
Summary

Auditory deviants can guide attention spatially, speeding visual responses. However, negative emotions may disrupt this effect, especially in the right hemisphere, highlighting dynamic attention regulation.

Keywords:
auditory deviantsdichotic listeningmultisensory perceptionspatial attentionvalence

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Area of Science:

  • Cognitive Neuroscience
  • Auditory Perception
  • Visual Attention

Background:

  • Auditory mismatch responses suggest attention modulation, but cross-modal attention guidance by deviants is unclear.
  • The interaction between auditory deviants, visual stimuli, and emotional valence on attention is not well understood.

Purpose of the Study:

  • To investigate if auditory deviants can direct spatial attention across modalities.
  • To examine how emotional valence of visual stimuli interacts with auditory attention guidance.

Main Methods:

  • Dichotic listening with lateralized auditory deviants and a visual target detection task.
  • Analysis of reaction times to assess visual stimulus processing speed based on auditory deviant location and visual stimulus valence.

Main Results:

  • Auditory deviants significantly speeded responses to visual stimuli presented on the same side.
  • Reduced facilitation for positive visual targets occurred when auditory deviants were spatially incongruent.
  • Significant interactions were found between emotional valence, visual field, and spatial congruency.

Conclusions:

  • Pre-attentive auditory processing can modulate spatial attention cross-modally.
  • Negative emotional valence processing, particularly in the right hemisphere, may override auditory attention guidance.
  • Attention allocation is dynamically regulated by multimodal sensory input and emotional processing.