[solved] Button-click response times

Comments

• lvanderlinden

  November 2013 edited 4:40PM

  Hi Rose,

  Welcome to the forum!

  Could you provide us with some more information? How did you try to determine the response time? And where does it go wrong? What kind of output do you get? Perhaps it would be easiest if you could upload your experimental script here by doing the following:

  • Open the "General properties" tab, click "Script editor" and copy the whole script,
  • go to http://pastbin.com or http://gist.github.com, upload your script there (simply paste and submit)
  • and provide us with the resulting link in your forum post.

  Best,

  Lotje

  Did you like my answer? Feel free to
• psychra

  November 2013 edited November 2013

  Hi Lotje,

  Thanks for the quick reply.

  You actually answered a question like this before. So I used the the inline script you posted (1) and followed your directions; however when i run the experiment this what comes up in the error box (2)

  1.

  https://gist.github.com/anonymous/7654856

  2.

  Error: Inline script error
  In: inline_script (run phase)
  Line: 10
  
  Python traceback:
  TypeError: unsupported operand type(s) for -: 'int' and 'unicode'
  
  Full traceback in debug window
  

  This is what I have for my form_base:
  https://gist.github.com/anonymous/7654849
• lvanderlinden

  November 2013 edited 4:40PM

  Hi Rose,

  Apparently I made a mistake in my inline script. To determine the time stamp of the form_base item, you should use:

  starting_time = self.get("time_my_form")
  

  instead of

  starting_time = self.get("my_form")
  

  Does that solve your problem?

  Best wishes.

  Lotje

  Did you like my answer? Feel free to
• psychra

  December 2013 edited December 2013

  Yes, it works perfectly.

  Thank you so much Lotje!
• Gio38000

  March 2023

  Hello,

  I hope you're doing well.

  I read this old conversation because I would also like to log the response time that participants give in a form_base. The thing is that in the "form_base" they have to put a string of 6 letters, so when I try to calculate the reaction time with "my_rt = current_time - starting_time" I get this message "unsupported operand type for (-) float and str. So I added the function float before (starting_time). But now I get this message ValueError: could not convert string to float: 'ABCDEF'.

  Do you have an idea about how can I solve this problem?

  
  

  Thank you very much in advance.
• sebastiaan

  March 2023

  Hi @Gio38000 ,

  It looks like the variable starting_time actually contains the response as opposed to the onset of the item. This is likely due to how you implemented this.

  That being said, you can get the reaction time more easily, by subtracting the onset time of the form item from the onset time of the subsequent item (e.g. a sketchpad that follows the form). Onset times of items are automatically available as time_[item name] variables. Does that clear things up?

  — Sebastiaan

  
  
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• Gio38000

  March 2023 edited March 2023

  
  
• Gio38000

  March 2023

  Thank you very much, @sebastiaan. I will do that. 😊