TypeError: c is undefined

Comments

• lvanderlinden

  November 2021

  Hi Stephan,

  
  

  Is it possible to upload your experiment here, so that we can have a look?

  
  

  Second question: What's the calculation of the response_time variable? In the data it appears not to be time_Resp - time_stim which is what i had expected.

  
  

   The variable "response_time" is calculated as the interval in milliseconds between the start of the response interval (that is, the initiation of, for example, the keyboard_response item) and the last response.

  
  

  For more information, see here:

  
  

  • https://osdoc.cogsci.nl/3.3/manual/variables/

  
  

  Cheers,

  
  

  Lotje

  Did you like my answer? Feel free to
• DahmSF

  November 2021

  Hi Lotje,

  thanks for the response on the response times. I believe that presenting the stimulus takes some time, which makes the differences. I think that would not be a problem if the canvas would be prepared in advance (as i did in python scripting), but using the drag and drop loop, loading the canvas is done within each loop. Therefore, the difference in RT is much more than the 16 ms presentation time.

  I tried to load up my experiment in the first place already. It appears to be to big for an upload. I always have many pictures as stimuli. You may grab it from here now 😉

  The experiment involves only the main part yet to keep it simple at the beginning.

  Stephan
• lvanderlinden

  November 2021

  Hi @DahmSF ,

  
  

  It runs in OS, but not in the Browser.
  

  
  

  I noticed that in the block_loop, you wrote the extension of the images in lower case (e.g., "Folie9.jpg", whereas in the file pool the extensions are written in capitals (e.g. "Folie9.JPG"). Could you try replacing the extensions in the loop item to ".JPG" and check whether this solves the problem?

  
  

  A quick way to do this, is as follows:

  
  

  • Open the tab of the loop item
  • On the top right, click on "View script"
  • Press Ctrl + H
  • Find "jpg" and replace all with "JPG"
  • On the top right, click on "Apply"
  

  
  

  On a side note, I noticed that, in the keyboard_response item, you put quotation marks around the square-bracket syntax to indicate the correct response. These should be removed, like so:

  
  

  

  
  

  Hope this helps!!

  
  

  Cheers,

  
  

  Lotje

  Did you like my answer? Feel free to
• DahmSF

  November 2021

  Thanks that helped.