Bouts of steps: The organization of infant exploration

Area of Science:

• Developmental Psychology
• Motor Development
• Human Locomotion

Background:

• Adult walking is goal-directed, primarily for navigation.
• The purpose of infant walking, particularly early walking, remains unclear.
• Understanding infant locomotion provides insights into early motor development and exploration.

Purpose of the Study:

• To investigate whether infants walk with the intention of reaching distant goals.
• To analyze the bout structure of infant walking to understand the reasons for starting and stopping.
• To explore the relationship between walking skill and locomotor exploration in infants.

Main Methods:

• Observation of 60 infants (30 13-month-olds, 30 19-month-olds) during natural walking in a playroom.
• Characterization of walking bout structure, including bout duration and step count.
• Survival analyses to determine factors influencing walking bout continuation and cessation.

Main Results:

• A significant proportion of infant walking bouts were very short (≤3 steps), insufficient for reaching distant goals.
• Most walking bouts ended in open spaces, not at specific destinations.
• Infants' likelihood of stopping walking was independent of bout length, suggesting a lack of goal-directedness.
• Younger infants (13-month-olds) showed a higher probability of stopping after short bouts.

Conclusions:

• Infant walking appears to be primarily exploratory rather than goal-directed.
• Locomotor exploration in infants is influenced by their developing walking skills.
• Early walking serves fundamental exploratory functions, paving the way for more complex navigation later.