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Videos de Conceptos Relacionados

Sensation01:21

Sensation

Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
Absolute thresholds can quantify the sensitivity of sensory...
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...
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.
Subliminal Perception01:15

Subliminal Perception

Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
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...
Perceptual Constancy01:12

Perceptual Constancy

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...

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Video Experimental Relacionado

Updated: Jul 14, 2026

Visualizing Visual Adaptation
04:43

Visualizing Visual Adaptation

Published on: April 24, 2017

Funciones psicofísicas para el tamaño percibido y recordado.

R S Moyer, D R Bradley, M H Sorensen

    Science (New York, N.Y.)
    |April 21, 1978
    PubMed
    Resumen

    La gente de la gente de la gente.

    Área de la Ciencia:

    • Psicología cognitiva psicología cognitiva.
    • La percepción visual es la percepción visual.
    • Investigación de la memoria Investigación de la memoria.

    Sus antecedentes:

    • Comprender la relación entre el tamaño del objeto percibido y el recordado es crucial para la ciencia cognitiva.
    • Investigaciones anteriores han explorado la percepción visual y el recuerdo de la memoria, pero las comparaciones directas de las funciones de estimación de tamaño son menos comunes.

    Objetivo del estudio:

    • Para investigar y comparar las funciones matemáticas que describen la estimación de los tamaños de objetos percibidos versus recordados.
    • Para determinar si hay diferencias sistemáticas en la forma en que el tamaño del objeto se representa en la percepción y la memoria.

    Principales métodos:

    • Se llevaron a cabo tres experimentos independientes con grupos separados de participantes.

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  • Los participantes estimaron el tamaño de los objetos basándose en la percepción directa o en el recuerdo de la memoria.
  • Los datos de estimación de tamaño recopilados fueron modelados matemáticamente utilizando funciones de potencia.

    • Principales resultados:

    • Los datos de las estimaciones de tamaño de objetos percibidos y recordados fueron bien ajustados por las funciones de potencia.
    • Un hallazgo confiable y consistente fue que el exponente para el tamaño recordado era más pequeño que el de tamaño percibido.
    • Esto indica una distorsión o compresión sistemática en la representación del tamaño de los objetos recordados en comparación con los percibidos.

    Conclusiones:

    • El estudio proporciona evidencia cuantitativa de las diferencias en la representación del tamaño del objeto entre la percepción y la memoria.
    • Las funciones de potencia estiman efectivamente el tamaño del modelo en ambas condiciones, destacando una diferencia de escala consistente.
    • Estos hallazgos contribuyen a una comprensión más profunda de los mecanismos cognitivos subyacentes a la percepción visual y al recuerdo de la memoria.