# 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 divided into eight color bins, just like the position bins.
**beh.t.digit:** the digit in the target stimulus.
for corresponding non-target/distractor values, see the **beh.nt** structure.
**beh.colorOffset:** the color response error (in degrees) i.e. the difference between the reported color and the actual target color.
**beh.rt:** response time.
## EEG ##
Contains two files for each subject:
SN_EEG_JJF_17_4.mat is the continuous (i.e. unsegmented) eeg data for subject SN
SN_EEG_SEG_JJF_17_4.mat is the segmented eeg data for subject SN.
### Segmented files ###
Each file contains the segmented EEG data for a given subject called "SN_EEG_SEG_JJF_17_4.mat" (where SN = subject number) The important variables are:
**erp.trial.baselined:** a trial x electrodes x samples matrix of EEG data (baselined corrected).
**erp.trial.baselineCorrection:** the baseline correction (trials x electrodes) so you can undo it if you like.
**erp.trial.times:** the time points included in each trial - in ms relative to the onset of the sample stimulus.
**erp.srate:** the sampling rate (Hz).
**erp.chanLabels:** the name of the electrodes in erp.trial.baselined.
**erp.arf.artifactIndCleaned:** the index of which trials were rejected due to artifacts.
### Unsegmented files ###
**eeg.data:** an eletrodes x trials matrix of EEG data for the entire session.
**eeg.srate:** the sampling rate (Hz).
**eeg.chanLabels:** the name of the electrodes in eeg.data.
**eeg.eventCodes:** a vector of the event markers sent during the session (see task script for details).
**eeg.eventTimes:** when those events occured.
## EyeTrack ##
Contains a eye tracking data file for each subject, called SN_EYE_SEG_JJF_17_4.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).
## Preprocessing Scripts ##
This folder contains the scripts used to preprocess the EEG and eye tracking data (i.e., these were the scripts used to obtained the files described above).
