Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

The scientists use various experiments, often based on simple games, to test the babies' physical or cognitive responses with sensors including: eye-tracking, brain activation and motion capture.

Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

Leo, 9 months, wears motion capture and surface electromyography (EMG) sensors as he takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

Geodesic Sensor Nets used for electroencephalogram (EEG) experiments at the Birkbeck Babylab, March 3, 2014.

Research assistant Katarina Begus, prepares a Geodesic Sensor Net for an electroencephalogram (EEG) experiment at the Birkbeck Babylab, March 3, 2014.

Leo, 9 months, wears a Geodesic Sensor Net as he prepares to take part in an experiment, March 3, 2014.

Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

The experiment studies "goals of actions" by using near infrared spectroscopy (NIRS), which uses light to study oxygen levels in the brain, while the baby watches a screen showing objects moving on differing paths.

Leo, 9 months, wears a Geodesic Sensor Net as he prepares to take part in an experiment, March 3, 2014.

Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

Research assistant Katarina Begus, monitors from behind a screen as Leo, 9 months, takes part in an experiment , March 3, 2014.

Leo, 9 months, is photographed after taking part in an experiment at the Birkbeck Babylab, March 3, 2014.

Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.

Leo, 9 months, takes part in an experiment, March 3, 2014.

Research assistant Katarina Begus, prepares a Geodesic Sensor Netvfor an electroencephalogram (EEG) experiment at the Birkbeck Babylab, March 3, 2014.

Leo, 9 months, wears a Geodesic Sensor Net as he prepares to take part in an experiment, March 3, 2014.

Leo, 9 months, takes part in an experiment at the Birkbeck Babylab, March 3, 2014.