Epistemic trust is the willingness to believe communicated information. At the heart of human cognitive development, epistemic trust is crucial for the transmission of knowledge and for learning. Under the supervision of Olivier Mascaro, my PhD work is part of the project "FoundTrust: The neurocognitive bases of epistemic trust". In particular, I am interested in the early development of epistemic trust in infants, their ability to detect communication act and their sensitivity to assertoric force.