Rookie IAT question

Comments

• sebastiaan

  August 2017

  Hi,

  Right, so you're essentially running into the issue that a sequence has a fixed order, right? Here's what you can do:

  1. In experimental_blocks_loop, define a variable run_block with four levels that correspond to your four blocks: 'CF_congruent', 'CF_incongruent', etc.
  2. In experimental_blocks_sequence, use run-if statements to run only one sequence. So for CF_congruent_block the run-if statement would be [run_block] = CF_congruent. Etc.

  Does that make sense? This creates a fairly deeply nested structure, which is aesthetically unpleasing, but it does the job.

  Cheers,
  Sebastiaan

  
  
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• Inakigil

  August 2017

  Hi Sebastiaan,

  Thank you very much for your reply! I've tried to do what you suggested, but maybe I didn't get it right because the program says that there's a mistake. Attached you can find both the reported error and what have I done.

  Thank you for your help!

  
  
  
• sebastiaan

  August 2017

  Hi,

  You're using a Python statement as a conditional statement. You can do that, but if so you need to prefix it with =. So either of these would be valid (and equivalent):

  • =var.run_block == 'CF_congruent'
  • [run_block] = CF_congruent

  See also:

  • http://osdoc.cogsci.nl/3.1/manual/variables/#using-conditional-if-statements

  Does that clear things up?

  Cheers,
  Sebastiaan

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

  August 2017

  Hi,

  Great! It works perfectly fine using the " =var.run_block == 'CF_congruent' " format. But, to be honest, I have to admit that I fail to understand why does not it work using the " [run_block] = CF_congruent " one. When you say that both options should be valid and equivalent, you mean that both should work or I am not interpreting you correctly?

  Thank you very much for your help!

  Best,
  Iñaki