Summary: New research shows that infants as young as eight months can flexibly adjust their learning strategies in response to changing environments. By combining eye-tracking with controlled shifts in visual stimuli, researchers observed that babies changed where and how they looked depending on whether a playful on-screen character appeared in predictable or unpredictable locations.
These findings indicate that very young children are active, not passive, learners: they update expectations and alter attention in real time. The study also linked individual differences in adaptive learning to how infants handle change in everyday situations, offering early clues about emotional and cognitive development.
Key Facts:
- Learning flexibility: Eight-month-old infants modify their learning strategies according to environmental stability or volatility.
- Visual prediction: Babies showed anticipatory looking, indicating they formed expectations about where a visual target would appear.
- Developmental links: Infants who struggled to adjust their learning behavior in the experiment tended to show more difficulty coping with change in daily life, pointing to potential early markers for later emotional traits.
Source: Radboud University
Babies as young as eight months can change how they learn when environments become unpredictable, according to research led by Francesco Poli at the Donders Institute of Radboud University. This study provides the first clear evidence that infants adopt flexible, volatility-sensitive learning strategies.
The prevailing assumption has long been that infants mainly absorb information passively. However, neuroscientist Francesco Poli and colleagues designed experiments showing that even at eight months, infants actively track and respond to patterns of change in their surroundings.
Poli’s team studied infants’ attention by presenting a brightly colored cartoon “monster” that appeared on a screen, sometimes consistently on one side and sometimes switching sides more often. The researchers used an eye-tracking camera built into the display to record where each infant looked and measured changes in pupil size as an index of arousal and attentional state.
Monster here, monster there
In the experiment, the likelihood of the monster appearing on a particular side was manipulated across trials. Some periods were stable, with the monster repeatedly appearing in the same location; other periods were volatile, with the monster’s location changing frequently. Over time, infants learned these patterns and began to anticipate the monster’s appearance, looking toward the most likely location before the character actually appeared.
When the pattern shifted from stable to volatile or vice versa, infants adjusted their gaze patterns and pupil dynamics accordingly. This behavior demonstrates that infants not only form expectations but also update them when the statistical structure of the environment changes. The researchers were surprised by the degree and speed of this flexible learning in such young participants.
Daily life
To explore real-world relevance, parents completed questionnaires describing how their infants respond to new situations—such as reactions during a peek-a-boo game or how readily a baby approaches unfamiliar toys. Infants who showed less efficient or overly sensitive adaptation in the lab tended to be the same infants whose parents reported more difficulty with everyday changes.
In adults, difficulties adjusting to change are associated with anxiety and depression. While the current findings suggest that early differences in adapting to environmental volatility might relate to later emotional outcomes, the authors emphasize that this remains speculative. Confirming long-term consequences will require longitudinal research that follows infants over time.
About this learning and neurodevelopment research news
Author: Thomas Haenen
Source: Radboud University
Contact: Thomas Haenen – Radboud University
Image: The image is credited to Neuroscience News
Original Research: Open access. “Volatility-driven learning in human infants” by Sabine Hunnius et al., published in Science Advances.
Abstract
Volatility-driven learning in human infants
Adapting to change is a core aspect of human learning, but its early developmental origins have been unclear. This study combined experimental and computational methods to trace how infants adapt their learning processes in response to changes in environmental volatility.
Using pupil size as an indicator of tonic and phasic noradrenergic activity, the researchers tracked how eight-month-old infants responded to trial-by-trial fluctuations in the predictability of a visual target. Tonic pupil size reflected moment-to-moment estimates of environmental volatility, while phasic pupil responses indicated that infants used these volatility estimates to optimize their learning dynamically.
This adaptive learning strategy produced successful task performance, evidenced by anticipatory looking toward the correct target locations. Individual differences in infants’ ability to estimate volatility were substantial, and those differences correlated with measures of infant temperament, suggesting an early link between cognitive adaptation and emotional reactivity.
Overall, the findings demonstrate that infants actively adapt to environmental change and suggest that early variation in this capacity could have important implications for long-term cognitive and psychosocial development.