IndentationError:

Comments

• sebastiaan

  January 2019

  Hi Atenas,

  An indentation error happens when you have not properly indicated the structure of your code using indentation (tab or spaces at the start of a line). This is a fundamental property of Python, so if you feel that you don't have a clear grasp on indentation, then I would first take a step back and start a basic Python tutorial. That will save you a lot of time and frustration later!

  • https://python.cogsci.nl/basic/syntax/

  Cheers!
  Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!
  
• Atenascampbell

  January 2019

  Hi, Sebastian.
  Thanks a lot for your help!. I´m very grateful for OpenSesame. I´m from México, my university doesn´t have economic resources to acquires softwares like e-prime. So OpenSesame is saving me and making my life so much easier.
  Have a good day!
• Atenascampbell

  January 2019

  Hi, again, @sebastiaan !
  So, I finally could got the counterbalancing, just like the tutorial shows. But:
  I have four blocks in total, I need that the first block runs across all the participants (Loop_NoT), the next three are the blocks where I putted the inline_script to get the counterbalance, but, with this code all the blocks runs across the participants. I need just one of the three blocks runs:
  e.g:
  Participant 1 : Loop_ Not and b1 but I don´t want to run the block 2 and 3.
  Participant 2 : Loop_ Not and b2 but I don´t want to run the block 1 and 3
  and so on,
  ¿what do I need to modify?
  Thanks,

  .
• sebastiaan

  January 2019

  Hi Atena,

  It looks like you're counterbalancing the order of the blocks right now (and not which participant does which block) although the details are a bit difficult to tell from your screenshot. I'm assuming that you have three blocks, and three groups of participants, and that you want to counterbalance like this:

  • Subject 1 → block1
  • Subject 2 → block2
  • Subject 3 → block3
  • Subject 4 → block1
  • Etc.

  Right?

  In that case, you can simplify the structure quite a bit, and put the blocks directly into the experiment sequence. And then you can use a Run If statement that checks the subject number and determines which block should be executed. So the structure would look something like this:

  experiment
  ...
  - Loop_NoT, run if: always
  ...
  - block1, run if: var.subject_nr % 3 == 1
  - block2, run if: var.subject_nr % 3 == 2
  - block3, run if: var.subject_nr % 3 == 0
  ...
  

  Note a few things:

  • The 'new' way to refer to experimental variables is var.[name], rather than self.get().
  • The modulo (%) operator gives the remainder of an integer division. This is useful for doing cyclical things like counterbalancing.

  Cheers!
  Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!
  
• Atenascampbell

  January 2019

  Right! Thanks a lot for your time, @sebastiaan !
  After many try I got it!

  So, I gonna let the printscreen if someone like me without experience with codes see this post.

  The best way to understand Sebastian´s explanation is consulting this two things:

  https://osdoc.cogsci.nl/3.2/manual/structure/sequence/
  https://osdoc.cogsci.nl/3.2/manual/variables/#using-conditional-if-statements

  And the result looks something like this:
  

  Thanks!