WSCT Tutorial

Comments

• lvanderlinden

  November 2020 edited November 2020

  Hi @fotisfotiadis ,

  
  

  Not sure why this discrepancy between OpenSesame and OSWeb occurs. In any case, you can solve the issue as follows:

  
  

  • Use only one keyboard_response item, call it "keyboard_response" (which is its name by default), do not set the correct response here (but see below), and set its Run-if statement to "always"
  • Use the variable "response_keyboard_response" to inspect the responses (and add it to your logger)
  • In order for OpenSesame to determine whether a response is correct or not, you can add a column called "correct_response" (case sensitive) to the block_loop and define the correct response per trial over here

  I attached a modified script. (I hope I defined the "correct_response" variable correctly...)

  6680.osexp

  
  

  Hope this helps!

  
  

  Cheers,

  
  

  Lotje

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• lvanderlinden

  November 2020

  On a different note: Shouldn't the order of the trials in the block loop be set to "sequential" instead of "random"? Since the point of the WCST is for participants to guess (new) rules on the basis of a sequence of trials?

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• fotisfotiadis

  November 2020

  Dear Lotje

  Thank you so much for your time. I wouldn't expect anyone to modify the script for me. Again, thank you.

  Just for the record, you are correct about the sequence of trials, but the correct variable is a bit more complicated. Luckily, the java script is here: https://osf.io/f5er2/

  
  

  One more question if I may, please.

  I discovered that I am unable to display Greek characters in a feedback item . No problem with a sketchpad though (I am only talking about the OSWB feature, there is no problem with the desktop version).

  Eg., in this stroop task (https://drive.google.com/file/d/1lJx5ad_Fg6FT9DrKnNv6Pt6r6frp0axY/view?usp=sharing), feedback is the words "correct" and "wrong" in Greek, which cause the Uncaught TypeError: Cannot read property 'replace' of undefined error. (If you wish to try it out, press 1 for red color, 2 for yellow, 3 for green)

  Is this a known issue?

  
  

  Again, thank you for your time,

  Fotis
• lvanderlinden

  November 2020 edited November 2020

  Hi @fotisfotiadis ,

  
  

  I see what you mean. I don't know what's causing this issue. I'll check with @sebastiaan to see whether this should be filed as an issue on OSWeb's github page:

  
  

  • https://github.com/open-cogsci/osweb/issues

  
  

  Cheers,

  
  

  Lotje

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• sebastiaan

  November 2020

  Hi @fotisfotiadis and @lvanderlinden ,

  The issue appears to be that OSWeb doesn't correctly parse non-Latin strings if they're not quoted (and single-word text elements aren't quoted by OpenSesame). I filed an issue for that here. For now, a simple workaround would be to add a single space before and after the words on the feedback item. If you look at the script, you'll see that this causes the text to be quoted, thus resolving the issue.

  — Sebastiaan

  
  
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