Question about exp.set function

Comments

• sebastiaan

  February 2017

  Hi,

  To understand the problem, you need to understand the prepare-run strategy that OpenSesame uses. Every item from a sequence is called twice: first to prepare, and then to run. In your case, you define your variables in the run phase of your inline_script. Because the sketchpad is prepared during the prepare phase (which comes first) the variables don't exist yet. Does that make sense?

  So the solution is to move your code to the prepare tab of the inline_script.

  See also:

  • http://osdoc.cogsci.nl/3.1/manual/prepare-run/

  Incidentally, exp.set() is outdated. The modern way to interact with experimental variables is to use the var.var_name syntax. See:

  • http://osdoc.cogsci.nl/3.1/manual/python/var/

  Cheers,
  Sebastiaan

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

  February 2017 edited February 2017

  Hi,

  thank you, that worked like a charm!
  However, now I have a different problem, again with the inline script. I tried to create a script to tell the program which response is correct, which looks like this:

  

  However, as you can see in the variable inspector, no matter what I do the accuracy is 0.
  What did I mess up this time?
• sebastiaan

  February 2017

  Hi,

  There are a few things wrong here. The first has to do with Python syntax:

  var.emotion = 'Happy' or 'Fear'
  

  As they say, I don't think this means what you think it means. You can find some background information about using and and or with strings here:

  • http://stackoverflow.com/questions/19213535/using-and-and-or-operator-with-python-strings

  But basically, if you want to make a random choice, you can do something like this:

  var.emotion = 'Happy' if sometimes() else 'Fear'
  

  Regarding setting var.correct_response: The expected value is a semicolon-separated string, not a list. So you'll simply want to do:

  var.correct_reponse = var.happy_response
  

  Cheers,
  Sebastiaan

  
  
  Check out SigmundAI.eu for our OpenSesame AI assistant!