that the trial-to-trial variation in neural processes is reflecting a latent state. Despite making no prior assumptions about functional connectivity between brain regions and without aiming to study functional networks, we find that for this simple target detection task, regions associated with task-dependent and default-mode networks transiently correlate with the trial-to-trial variability of the EEG discriminating components, and they do so on a millisecond timescale with a distinct temporal ordering.
