# Instructions for use #
## Behavior ##
Contains a compiled behavior file for each subject called "SN_Behavior.mat", where SN = subject number. Here are the critical variables in each file:
**beh.t.pos:** the exact angular position of the target in degrees (range = 0-359). 0 degrees is at 3 O'Clock. Increasing values go in the clockwise direction.
**beh.t.posBin:** the angular position bin that the target stimulus occupied (1 = the bin centered at 0 degrees, 2 = bin centered at 45 degrees, and so forth).
**beh.t.col:** the color value of the target (range = 1-360).
**beh.t.colBin:** the color values sorted into eight color bins, just like the position bins.
for corresponding non-target/distractor values, see the beh.nt structure.
**beh.reportedCol:** the reported color.
**beh.colOffset:** the color response error (in degrees) i.e. the difference between the reported color and the actual target color.
## EEG ##
Contains one file for each subject caled SubNum_EEG.mat. The important variables are:
**erp.srate:** the sampling rate (in Hz).
**erp.trial.data:** a trials x electrodes x samples matrix of EEG data.
**erp.trial.times:** the vector of times (relative to stimulus onset) that each trial segment contains.
**erp.chanLabels:** the positions of the electrodes.
**erp.arf.artifactIndCleaned:** index of trials with artifacts (1 = artifact, 0 = clean trial).
Note: the sampling rate was 500 Hz in this experiment.
Also note: there are not files for Sub 21. This subject was excluded on the basis of poor behavioral performance.
## EyeTrack ##
Contains a eye tracking data file for each subject, called SN_EYE_SEG_JF1.mat, where SN = subject number. The important variables are:
**eyeData.sRate:** the sampling rate (Hz).
**eyeData.trial.times:** the times in each trial segment (relative to stimulus onset. e.g. -300 -298 -296 ... 1248 1250 indicates that each segment starts 300 ms pre-stimulus and ends 1250 ms post-stimulus (sampling every 2 ms).
**eyeData.trial.xDeg:** horizontal distance of gaze from fixation in degrees of visual angle (trials x samples).
**eyeData.trial.yDeg:** vertical distance of gaze from fixation in degrees of visual angle (trials x samples).
Note: not all subjects had eye tracking data. Refer to the Subject Summary sheet in the parent component.
## Preprocessing Scripts ##
**EEGPreprocessingPipeline:** this zipped folder contains the scripts used to preprocess the EEG data.
**EyeTracking:** this zipped folder contains the scripts used to preprocess the eyetracking data.
