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Related Concept Videos

Depth Perception and Spatial Vision01:15

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.
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...
Factors Affecting Perception01:25

Factors Affecting Perception

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...
Local Attraction01:22

Local Attraction

Local attraction refers to disturbances in compass readings caused by magnetic influences from nearby objects such as metal fences, buried pipes, vehicles, buildings, power lines, or natural iron ore deposits. Small items like wristwatches, steel tools, or belt buckles can also interfere with the compass by creating local magnetic fields that distort the Earth's natural magnetic field. These distortions lead to inaccurate readings, posing navigation and land surveying challenges.Local...
Framing Effects03:26

Framing Effects

Information is everywhere and its presentation—such as how and when items are presented—can impact our perceptions and decisions surrounding the info. This broad concept umbrellas framing effects—influences that occur due to the way information is framed in its appearance, whether it’s purely the order or the specific wording of a message. Let’s take a look at numerous ways in which two versions of something can objectively say the same thing, yet we respond in different ways based on the...

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Related Experiment Video

Updated: Jun 21, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

[Distracter effect on the right angle perception].

A Bulatov, A Bertulis, A Beliavichus

    Zhurnal Vysshei Nervnoi Deiatelnosti Imeni I P Pavlova
    |July 14, 2009
    PubMed
    Summary

    Visual perception of angles is distorted by flanking stripes, affecting spatial judgments. This study quantifies angle distortions and models lateral interactions in the visual system.

    Area of Science:

    • Visual perception
    • Computational neuroscience
    • Psychophysics

    Context:

    • Investigates visual angle distortions caused by distracting elements.
    • Examines how flanking stripes influence the perception of orthogonal orientations.

    Purpose:

    • To measure the dependence of angle error on the distance between stimulus spots and distracting stripes.
    • To model the lateral interaction processes in the visual pathways responsible for these distortions.

    Summary:

    • Subjects readjusted right-angle orientations distorted by flanking stripes.
    • Error in angle perception was measured relative to spot-to-stripe distance.
    • A mathematical model based on centroid biases explained lateral interactions and information averaging.

    More Related Videos

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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: Jun 21, 2026

    Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
    09:49

    Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

    Published on: April 16, 2014

    Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
    08:04

    Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues

    Published on: December 4, 2013

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

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

    Published on: January 23, 2017

    Impact:

    • Provides quantitative parameters for lateral interactions in visual processing.
    • Demonstrates a simplified model accurately predicting experimental data.
    • Enhances understanding of spatial information processing in the human visual system.