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tools:antisaccade:anti [2025/09/26 12:46] – [Anti Antisaccade Task] willtools:antisaccade:anti [2026/08/06 14:27] (current) – [Visual Angle] will
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 ====== Anti Antisaccade Task ====== ====== Anti Antisaccade Task ======
-Anti is a [[:tools:eyetracking]] [[:tools:antisaccade]] (not to be confused with [[:tools:anti:antistate]]) written in [[:tools:Eprime]] for [[:tools:eyetracking:asl]].+**"Anti"** is a [[:tools:eyetracking]] [[:tools:antisaccade]] (not to be confused with **"AntiState"**  [[:tools:antisaccade:antistate]]) written in [[:tools:Eprime]] for [[:tools:eyetracking:asl]].
  
 The task was used in [[:grants:7t]], behavioral visit of [[:grants:pet]] and [[:grants:cog]] (?) The task was used in [[:grants:7t]], behavioral visit of [[:grants:pet]] and [[:grants:cog]] (?)
 +
 +Trials are like
 +
 +  * **antifix** -- red cross, variable {''0.5'',''2'',''4'',''6''} sec
 +  * **gap**  -- blank, ''.2''sec
 +  * **cue** -- yellow circle, ''1'' sec. At {''40, 180,460, 600''}px / 640px total, likely +/- 7 and 14 deg from center.
 +
 +
 +The 200ms blank screen "gap" event was dropped in some experiments (@ MR) to increase accuracy at younger ages. [[https://pmc.ncbi.nlm.nih.gov/articles/PMC2733315/|Velanova et al., 2008]], [[https://www.jneurosci.org/content/jneuro/33/46/18109.full.pdf|Ordez et al., 2013]]
  
 The Eprime file can be found in ''bea_res/Tasks/Behavorial/anti-beakid/ANTI.es'' The Eprime file can be found in ''bea_res/Tasks/Behavorial/anti-beakid/ANTI.es''
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 ===== EPrime Code ===== ===== EPrime Code =====
 +
 +{{ tools:pasted:20230630-142146.png |}}
  
 Task settings and order from EPrime file Task settings and order from EPrime file
 +
  
 <code> <code>
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 ===== Cue Duration ===== ===== Cue Duration =====
  
-In the [[:grants:7t:behavioral|7T Behavioral Protocol]], duration for the red fix cross are ''0.5'' ''2'' ''4'' ''6''. There are 12 of each.+In the [[:grants:7t:behavioral|7T Behavioral Protocol]], duration for the red fix cross are ''0.5'' ''2'' ''4'' ''6''. There are 12 of each. The extra ''.2'' seconds is the "gap" which does not have it's own trigger in the eye recording data.
  
 <code=R> <code=R>
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 #  values : num [1:4] 0.7 2.2 4.2 6.2 #  values : num [1:4] 0.7 2.2 4.2 6.2
 </code> </code>
 +
 +===== Visual Angle =====
 +
 +**Likely** <wrap tip>+/- 7 and 14 degrees from center</wrap> using the post-renovation screen and screen-to-eye measurements (32deg screen) and using the EPrime force screen width resolution of 640px. Also see [[tools:antisaccade:eeg]] for measurements in the EEG loef setup.
 +
 +<code sh loc_from_EP.bash>
 +grep 'ValueString.*\tanti' '/Volumes/L/bea_res/Tasks/Behavorial/anti-beakid/ANTI.es'|
 +  perl -lne '@a=(split /\\t/, $_);print $a[4]'|
 +  sort -un
 +  
 +40
 +180
 +460
 +600
 +</code>
 +
 +<code R angle.R>
 +c(40,180,460,600)/640 * 32 - 32/2
 +# [1] -14  -7   7  14
 +</code>
 +{{.:pasted:20251008-153123.png}}
 +
 +
 +Also see https://www.sr-research.com/visual-angle-calculator/