====== Anti @ EEG ======

Anti@EEG is a version of [[:tools:antisaccade]] originally developed for [[:grants:7t]].

The source is [[https://github.com/LabNeuroCogDevel/mgs_encode_memory.py/blob/master/vgs_anti.py|vgs_ant.py]] ([[:tools:psychopy]]) part of [[:tools:mgs|Memory Guided Saccade (MGS) Task]], same interface can also run [[:tools:vgs]].

Used in [[:grants:7t:eeg]],  [[:grants:habit:eeg]],  [[:grants:spa:eeg]].

[[dollarreward]]'s psychopy implementation can also be run with parallel port (LPT) Status channel triggers enabled for EEG recording.
===== Degree Visual Angle/Distance Measurements =====

For local SSR [[tools:eyetracking#Configurations|measurements]] to visual angle, see [[tools:antisaccade:anti#visual_angle|Anti's visual angle section]] and [[https://www.sr-research.com/visual-angle-calculator/|SRR's visual angle calculator]]. 

  * 2026-08-06 (FC,VD,WF): EEG DollarReward dots presented at <wrap tip> 8, 16, and 23 degrees from center</wrap>.
  * 2026-07-30 (WF, PV): EEG chin rest measurements

^ screen width            |''53'' cm / ''1920'' px|
^ screen height           |''30'' cm / ''1080'' px|
^ chinrest eye to bottom  |''61.5'' cm |
^ chin rest eye to top    |''60'' cm|


<code=R>
rad2deg <- \(x) x * 180/pi           # 180deg is pi radians
dot_pos <- c(7,108,214)              # relative to a 640px screen
from_center_px <- 640/2 - dot_pos    # pixel position from center
fc_cm <- from_center_px * 53/640     # pixel to screen distance on 53cm wide screen
dotdegs <- atan(fc_cm/60)|>rad2deg() # angle from center to points w/ 60cm eye-to-screen

#  23.374051 16.316696  8.327162
</code>
{{.:pasted:20260806-153510.png?300}}

===== Saccade scoring =====

Using EOG, see [[:tools:antisaccade#eog_data]]

''Hera/Projects/7TBrainMech/scripts/eeg/eog_cal''

<code make /Volumes/Hera/Projects/7TBrainMech/scripts/eeg/Makefile>
eog_cal/eye_scored_mgs_eog_cleanvisit.csv: eog_cal/eye_scored_mgs_eog.csv
        cd eog_cal && Rscript clean_eog_visit.R

eog_cal/eye_scored_mgs_eog.csv: $(wildcard /Volumes/Hera/Raw/EEG/7TBrainMech/1*_2*/*_mgs*.bdf) $(wildcard /Volumes/Hera/Raw/EEG/7TBrainMech/1*_2*/*_MGS*.bdf)
        cd eog_cal && ml score_eog.m
</code>