Figure 3
From: Conscious processing of auditory regularities induces a pupil dilation
A pupil dilation occurred during violations of global regularity. Grand-averages of right eye pupil horizontal diameter (in pixels) are plotted over time (in milliseconds) in the active counting version of the ‘local global’ task both for the local (upper panels) and global (lower panels) effects. The artefact rejection (N = 56 participants; left panels) and artefact interpolation (N = 60 participants; right panels) methods led to the same results. While the event-related pupil response was undistinguishable between local standard (green curves) and local deviant (red curves) trials, a strong global effect was observed: a significant (black horizontal segments) pupil dilation was observed in response to global deviant trials. This effect began around 1 second after trial onset, peaked around 1.5 second and was sustained during more than 3 seconds. This effect was observed on horizontal and vertical diameters of both eyes. The vertical dotted line indicates the temporal offset of the five sounds defining a trial.
