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Related Concept Videos

Concepts and Prototypes01:24

Concepts and Prototypes

The human nervous system handles vast amounts of information by translating sensory stimuli into neural impulses, which the brain processes, creating thoughts expressed through language or stored as memories. The brain also synthesizes information from emotions and memories, which significantly influence thoughts and behaviors. This intricate process creates a comprehensive mental picture.
The brain organizes this information using concepts, which are mental categories grouping linguistic data,...
Storage01:23

Storage

A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze each...
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.
Visual Agnosia01:12

Visual Agnosia

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"...
Long-Term Memory01:18

Long-Term Memory

Long-term memory is a relatively permanent type of memory, capable of storing vast amounts of information over extended periods. Its storage capacity is generally considered unlimited.
Long-term memory can be categorized into two primary types: explicit and implicit memory. Explicit memory, also known as declarative memory, involves the conscious recollection of information that we deliberately try to remember, recall, and articulate. This type of memory encompasses specific facts, events, and...
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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Related Experiment Video

Updated: Jun 10, 2026

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions
06:54

Methods for Presenting Real-world Objects Under Controlled Laboratory Conditions

Published on: June 21, 2019

Conceptual distinctiveness supports detailed visual long-term memory for real-world objects.

Talia Konkle1, Timothy F Brady, George A Alvarez

  • 1Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. tkonkle@mit.edu

Journal of Experimental Psychology. General
|August 4, 2010
PubMed
Summary

Human visual long-term memory is vast, storing many object details. Memory relies more on conceptual understanding than visual appearance, especially when recalling numerous items.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Memory

Background:

  • Humans possess a remarkable capacity for visual long-term memory.
  • Understanding the factors influencing the fidelity of these memory representations is crucial.

Purpose of the Study:

  • To investigate the fidelity of visual long-term memory for object exemplars.
  • To determine how conceptual and perceptual features of object categories impact memory capacity and interference.

Main Methods:

  • Participants viewed 2,800 object images across various categories with differing numbers of exemplars.
  • A two-alternative forced-choice task was used to test memory for previously studied exemplars.

Main Results:

  • High memory performance (82% accuracy) was observed even with 16 exemplars per category, indicating substantial memory capacity.
  • Memory performance declined with increased exemplars, suggesting categorical interference.
  • Conceptually distinctive categories exhibited less interference than perceptually distinctive categories.
  • Perceptual distinctiveness predicted visual search rates but not memory interference.

Conclusions:

  • Visual long-term memory capacity is significantly influenced by the conceptual structure of object categories.
  • Conceptual distinctiveness plays a more critical role in mitigating memory interference than perceptual distinctiveness.