====== Switch Task (MMY4, SPA) ======
Also known as  ''nBMSI''  n-Back Multi-Source Interference. Original used [[tools:mmy4:switch|MMY4]] but with 3rd n-back trial type.

Code shared publicly at https://github.com/labneurocogdevel/MMY4 written in [[:tools:matlab]] with [[:tools:psychtoolbox]] and adapted for EEG with [[:tools:psycyhopy]]/python

Bart's 2016 WPIC poster on the task: {{ :tools:larsen_wpic_2016.pdf |Brain state expression and cognitive flexibility in adolescence and young-adulthood}}

===== MR =====
See [[:tools:switchtask:mr]]

===== Use =====
On the behavioral task computer, open Matlab ((as of 2023-11-30 this is still Matlab2015 on 32bit windows)) and run ''nBMSI LUNAID RUNTYPE''. 

''LUNAID'' should be the participants 5 digit lunaid and ''RUNTYPE'' is ''green'', ''red'', or ''in/cog1'' to ''in/cog6''



The desktop icon will launch matlab in the correct directory. Launching matlab is slow

{{:tools:pasted:20231130-153548.png}}


{{:tools:pasted:20231130-153955.png}}

Practice for lunaid ''12345'' looks like
<code>
cd C:\Users\localadmin\Desktop\SPASwitch_Cog_Inf
nBMSI 12345 green practice
nBMSI 12345 red practice
nBMSI 12345 in/cog1 practice
</code>

and actually running like
<code>
cd C:\Users\localadmin\Desktop\SPASwitch_Cog_Inf
nBMSI 12345 green
nBMSI 12345 red
nBMSI 12345 in/cog1
nBMSI 12345 in/cog2
nBMSI 12345 in/cog3
nBMSI 12345 in/cog4
nBMSI 12345 in/cog5
nBMSI 12345 in/cog6
</code>


In the matlab command window, to save time and keep inputs consistent look to keyboard shortcuts:
  * ''up arrow''key to pull previously run commands.
  * ''ctrl+left arrow'' and ''ctrl+right arrow'' move the input text cursor by word.
  * ''Shift+ctrl+left'' to highlight a word (and type over it to replace)
==== Early Quit ====

  * use the ''Escape'' key to quit early.
  * if something goes very wrong: ''Alt+Tab'' then ''Ctrl+c'' then ''sca''
    - Hold ''Alt'' and tap ''Tab'' until the matlab icon is selected
    - Hold ''Control'' and tap ''c'' (''Ctrl+c''). 
    - type (blindly) ''sca'' and then hit ''enter''

===== Trouble shooting =====

==== Undefined ====
An error may move matlab's working directory to the wrong path (esp. into ''private''). You'll get the error
<code>
Undefined function or variable 'nBMSI'.
</code>
{{:tools:pasted:20231130-144202.png}}

To fix, ''cd'' to the correct directory
<code>
cd C:\Users\localadmin\Desktop\SPASwitch_Cog_Inf
</code>