Student Scholar Symposium Abstracts and Posters

Document Type


Publication Date

Spring 5-6-2021

Faculty Advisor(s)

Aaron Schurger and Uri Maoz


When making spontaneous movements, individuals report becoming consciously aware of movement intentions roughly 200 milliseconds before movement itself. However, when intention timing is measured by interrupting people and asking if they intended to move, estimates place intention onset much earlier, at up to 800-1000 milliseconds before movement. It is unclear whether the early timing demonstrates a latent awareness of intention long before movement, or if people simply make a metacognitive judgment in response to the interruption. We will test this by measuring pupil size, which is related to awareness, and taking note of any differences between when people report having an intention versus when they report not having one. Differences before the interruption would suggest that participants were already latently aware of an intention when they were interrupted. No difference before, and only a difference after interruption, would suggest that participants only made a metacognitive judgment after being interrupted, and were not latently aware of intention beforehand.


Presented at the virtual Spring 2021 Student Scholar Symposium at Chapman University.