Related Experiment Video
Updated: Aug 23, 2026

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
Published on: January 15, 2018
Insights
Young infants
Area of Science:
- Developmental Psychology
- Infant Perception
- Motor Control
Background:
- Previous research suggested infants experience distress from conflicting sensory information.
- Understanding infant responses to visual stimuli is crucial for developmental studies.
Purpose of the Study:
- To investigate infant emotional and reaching responses to visual object images.
- To determine if infants show distress when visual and tactile information conflict.
Main Methods:
- Infants (3, 5, 7 months) were presented with solid objects and their images.
- Stimuli were placed within and beyond the infant's arm's reach.
- Emotional reactions and reaching behaviors were recorded.
Main Results:
- Infant emotional reactions and reaching behaviors were similar for solid objects and images.
- No significant distress was observed due to visual-tactile discrepancies.
- Reaching initiation appears primarily visually guided in young infants.
Conclusions:
- Infant reaching behavior is predominantly controlled by visual input.
- Tactile feedback from grasping has minimal influence on early reaching attempts.
- Young infants do not exhibit distress from discordant visual-tactile information in this context.
Abstract:
Infants aged 3, 5, and 7 months were shown solid objects and comparable intangible images of objects both within and beyond possible arm's reach. The infant's emotional reactions and reaching behavior in the presence of the image stimuli were very similar to their responses to the solid objects. The results do not support the reports of previous studies using a similar tactual-visual conflict situation that young infants become emotionally distressed when presented with discordant visual and tactual information. It was concluded that the initation of reaching attempts by young infants is predominantly visually controlled and any tactual-kinesthetic feedback from prehension seems to produce very little modification of young infants' reaching behavior.
Related Concept Videos
Vision
Major Somatic Sensory Pathways
Anatomy of the Eyeball
Depth Perception and Spatial Vision
Visual System
Once through the pupil, the light passes through the lens, a...
Visual Agnosia

