Neural Signals and Human Behavior - encodingN200

Behavioral and EEG data collected while participants performed a two-alternative forced-choice task where they discriminated whether a Gabor patch presented with added dynamic noise is higher or lower spatial frequency \citep[for details, see Experiment 2 by][]{nunez2019latency}. Task difficulty was manipulated by adding spatial white noise to manipulate the quality of perceptual evidence available to make the discrimination. The signal and the noise flickered at 40 and 30 Hz frequencies, respectively. 4 participants performed the task in blocks of trials at 3 added noise levels (low, medium, and high). Each subject performed approximately 3000 trials over 7 experimental sessions, while 128 channels of EEG and behavioral data were recorded.