Related Experiment Video
Updated: Aug 10, 2026
03:56
A View of Their Own: Capturing the Egocentric View of Infants and Toddlers with Head-Mounted Cameras
Published on: October 5, 2018
Infants' perception of object unity in translating and rotating displays
1Department of Psychology, University of Virginia, Charlottesville 22903, USA. dre8m@virginia.edu
Developmental Psychology
|May 23, 1998
Summary
Infants
Area of Science:
- Cognitive Psychology
- Developmental Psychology
- Perception
Background:
- Infants' perception of object unity is crucial for understanding the world.
- Previous research suggests infants can perceive object unity under certain conditions.
Purpose of the Study:
- To investigate infant sensitivity to the unity of partly occluded moving objects.
- To determine if different types of motion (translation, rotation, oscillation) affect object perception in infants.
- To explore the influence of occluder shape on infant perception.
Main Methods:
- Three experiments were conducted with 4- and 6-month-old infants.
- Infants were presented with partly occluded rods undergoing various motions (translation, rotation, oscillation).
- Infant responses were observed to assess their perception of object unity and continuity.
Main Results:
- Four-month-olds perceived a translating rod as unified but not a rotating one.
- Six-month-olds perceived a rotating rod as continuous but not an oscillating one.
- Six-month-olds showed ambiguous perception of a rotating rod when the occluder shape changed.
Conclusions:
- Infants' perception of occluded objects is influenced by the type of motion.
- Different motion types provide varying information about object unity and continuity.
- Factors at the occluder-object intersection and motion characteristics are critical for infant perception.
Related Concept Videos
01:15Depth 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.
01:21Gestalt Principles of Perception
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...
01:12Perceptual 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...
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...
01:14Piaget's Stage 1 of Cognitive Development
The sensorimotor stage, the initial phase of Jean Piaget's theory of cognitive development, spans the first two years of a child's life. During this period, infants actively engage with their surroundings, building cognitive awareness through direct interaction with the world. This interaction is primarily based on sensory perception and motor actions, allowing infants to gradually understand basic physical properties and predict how objects interact within their environment.
Exploration...
Exploration...
01:17Piaget's Stage 3 of Cognitive Development
During Piaget's concrete operational stage, from ages 7 to 11, children exhibit a marked increase in logical thinking skills, specifically in relation to tangible, real-world events. This stage is characterized by the development of several essential cognitive concepts, including conservation, reversibility, and classification, all of which support the child's evolving capacity for structured thought.
Conservation and Constancy of Quantity
A significant cognitive milestone in the concrete...
Conservation and Constancy of Quantity
A significant cognitive milestone in the concrete...
01:21The Nativist Approach
The nativist approach to infant cognitive development proposes that infants are born with inherent knowledge structures that allow them to interpret the world almost immediately. This perspective contrasts with earlier developmental theories, such as those proposed by Jean Piaget, which emphasized a more gradual acquisition of cognitive abilities through interaction with the environment. One key concept in this approach is object permanence — the understanding that objects continue to exist...