Have you checked Viola Macchi's research? She found an "other age effect" from 9 months of age if I am correct

yours

Olivier

Thank you Olivier, Viola's research has been very helpful in helping me understand one of my findings in a recent eye-tracking study with 2.5 months old infants. Thank you for pointing me in the direction of her work.

Siobhan

Have you read this research even though is based on mirror neuron approach.

Simpson EA, Murray L, Paukner A, Ferrari PF. The mirror neuron system as revealed through neonatal imitation: presence from birth, predictive power and evidence of plasticity. Philosophical Transactions of the Royal Society B: Biological Sciences. 2014 Apr 28;369(1644):20130289–20130289.