Related Experiment Video
Updated: Dec 30, 2025
08:12
A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
Published on: March 1, 2022
2.9K
Adaptation to mean and variance: Interrelationships between mean and variance representations in orientation
Jinhyeok Jeong1, Sang Chul Chong2
1The Graduate Program in Cognitive Science, Yonsei University, Seoul, South Korea.
Vision Research
|January 20, 2020
Summary
The visual system efficiently processes many items using summary statistics like mean and variance. This study reveals that representations of orientation mean and variance interact, influencing each other
Area of Science:
- Visual perception
- Cognitive neuroscience
- Computational vision
Background:
- The visual system efficiently processes numerous items by representing summary statistics, such as mean and variance.
- While mean and variance representations have been studied individually, their interaction remains underexplored.
Purpose of the Study:
- To investigate the potential interaction between the visual system's representations of mean and variance.
- To determine if adaptation to one statistical property affects the perception of the other.
Main Methods:
- Utilized a visual adaptation paradigm with orientation arrays.
- Manipulated either the mean or variance of adaptor arrays while keeping the other fixed.
- Assessed participants' discrimination of test array properties after adaptation.
Main Results:
- Adaptation to orientation variance significantly influenced the sensitivity of mean orientation discrimination.
- Adaptation to mean orientation biased the discrimination of orientation variance.
- Demonstrated a significant interaction between mean and variance representations in visual processing.
Conclusions:
- Mean and variance representations in the visual system are not independent but closely interact.
- These interactions likely support the complementary roles of mean (central tendency) and variance (dispersion) in effectively summarizing complex visual information.
Related Concept Videos
01:15Variance
11.8K
The deviations show how spread out the data are about the mean. A positive deviation occurs when the data value exceeds the mean, whereas a negative deviation occurs when the data value is less than the mean. If the deviations are added, the sum is always zero. So one cannot simply add the deviations to get the data spread. By squaring the deviations, the numbers are made positive; thus, their sum will also be positive.
The standard deviation measures the spread in the same units as the data....
The standard deviation measures the spread in the same units as the data....
11.8K
01:29Theory of Attribution II: Kelley's Covariation Theory
409
Attribution theory plays a crucial role in social psychology, helping to explain how individuals interpret the causes of behavior. One prominent model within this field is Harold Kelley's covariation theory, which provides a systematic approach to determining whether internal traits or external circumstances drive a person's actions. The model posits that individuals rely on three key types of information—consensus, consistency, and distinctiveness—to make these judgments.Consensus:...
409
01:25Factors Affecting Perception
2.5K
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...
An illustrative example of a perceptual set is the scenario where an airline pilot told...
2.5K
01:12Perceptual Constancy
1.1K
Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
1.1K
01:21Gestalt Principles of Perception
946
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...
946
01:15Depth Perception and Spatial Vision
1.7K
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.
1.7K