Infant Brains Categorize Objects by 2 Months Old

Groundbreaking study reveals surprising visual processing abilities in young infants

Published on Feb. 24, 2026

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A recent study utilizing functional MRI scans of over 100 infants revealed that their visual systems demonstrate a surprising ability to distinguish between common objects, mirroring patterns observed in adult brains. The research suggests that even at just two months old, babies' brains are actively categorizing the world around them, challenging traditional views of cognitive development.

Why it matters

This research has significant implications for how we understand infant learning and cognitive development. It suggests that babies are not 'blank slates' but arrive with a pre-wired capacity for organizing visual information, laying the foundation for future learning and development.

The details

The study, led by researchers at Trinity College Dublin and Stanford University, showed that infants' brains respond differently to images from 12 distinct categories, such as birds, trees, and everyday objects like cats and shopping carts. This suggests that the ventral visual cortex - the part of the brain responsible for object recognition - is already organizing visual information into meaningful groups, even at this incredibly young age. Interestingly, these categorization patterns align with those of deep neural networks trained to identify objects, hinting at a shared underlying structure in how brains and artificial intelligence process visual data.

  • The study utilized functional MRI scans of over 100 infants at two months old.
  • A subset of infants were rescanned at nine months of age.

The players

Clíona O'Doherty

A postdoctoral scholar at Stanford University and a key investigator in the study.

Rhodri Cusack

A professor of cognitive neuroscience at Trinity College Dublin.

Heather Kosakowski

An assistant professor of psychology at the University of Southern California.

Apurva Ratan Murty

An assistant professor of cognition and brain science at the Georgia Institute of Technology.

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What they’re saying

“A lot of the complex category structure used by the neural network models to classify objects was already there in the 2-month-olds.”

— Clíona O'Doherty, Postdoctoral scholar (Nature Neuroscience)

“Perhaps the lateral regions are just slower to develop as they need this motor connection.”

— Rhodri Cusack, Professor of cognitive neuroscience (Nature Neuroscience)

“There were hints that this [adult similarity] might be true for 5- and 7-year-olds, but to see that it's true for infants is really exciting.”

— Heather Kosakowski, Assistant professor of psychology (Nature Neuroscience)

“To be able to do so at the scale reported in the paper is quite incredible.”

— Apurva Ratan Murty, Assistant professor of cognition and brain science (Nature Neuroscience)

What’s next

Researchers are now looking beyond simple object recognition, planning to investigate how long infants retain memories of objects and whether they can understand relationships between different categories.

The takeaway

This research suggests that babies are not 'blank slates' but arrive with a pre-wired capacity for organizing visual information, laying the foundation for future learning and development. It challenges traditional views of cognitive development and highlights the incredible complexity of the infant brain.