[solved] Display rt in Feedback

Comments

• lvanderlinden

  February 2013 edited 5:10AM

  Hi Boris,

  In your second piece of OpenSesame code
  

  draw textline 0 -164 "Temps4: [response_time]

  you don't end the to-be-displayed string with double quotes. It should be:
  

  draw textline 0 -164 "Temps4: [response_time]"

  Could that just be it? Or is that a typo in the forum post and not in your actual script?

  Another thing that comes to mind is that you're trying to use a sketchpad item (rather than a feedback item) to display the trial response feedback. A sketchpad is constructed during the prepare phase of the trial sequence, and its content can therefore not depend on what happens later on in the sequence (e.g. during response collection). Feedback items, on the other hand, are constructed during the run phase of the sequence and therefore can depend on values (such as 'response' and 'response_time') that are collected just before.

  If those suggestions do not solve your problem, don't hesitate to post again!

  Best,

  Lotje

  Did you like my answer? Feel free to
• boris

  February 2013 edited 5:10AM

  Another thing that comes to mind is that you're trying to use a sketchpad item (rather than a feedback item) to display the trial response feedback. A sketchpad is constructed during the prepare phase of the trial sequence, and its content can therefore not depend on what happens later on in the sequence (e.g. during response collection). Feedback items, on the other hand, are constructed during the run phase of the sequence and therefore can depend on values (such as 'response' and 'response_time') that are collected just before.

  That was the crucial point ! As sketchpad are very often used in the examples, I used sketchpads and this was my mistake...
• boris

  February 2013 edited 5:10AM

  Another problem is that when I want to store the "response_time" in a variable in an inline (even in the "Run Phase" tab), it is not possible...
  For instance

  Somme = Somme + response_time

  
  is returning:
  NameError: name 'response_time' is not defined
• Wouter

  February 2013 edited February 2013

  Hi boris,

  variables in your loop tables, or feedback variables like response_time are set in self.experiment. They are not immediately accessible within your inline_script items, but you can 'get' and 'set' them using the experiment object

  rt = self.experiment.get("response_time")
  somme = somme + rt
  

  or

  exp.get("response_time") # you can use exp, instead of self.experiment
  somme += rt # x += 1 is equivalent to x=x+1
  

  Note that if you want 'somme' to be available throughout the experiment as well, you should consider setting it using exp.set(), or defining it as global.

  see: http://osdoc.cogsci.nl/usage/variables-and-conditional-qifq-statements/#getting-and-setting
• boris

  February 2013 edited February 2013

  I think I found a solution to the previous problem

  This code is passing (but I do not know if Somme is correctly update)

  Somme = Somme + self.get('response_time')

  Then, at the end of the block I compute
  
  global CountMot, Somme, Moy
  
  Moy = Somme / CountMot
  

  And , finally in my feedback I'd like to display Moy but that is not possible
  OS is returning:
  

  Description: Variable 'Moy' is not set in item 'feedback'.

  My script is there:
  https://docs.google.com/file/d/0B-sE9ac1ksCAS3V1Q3NtU1ZIcDA/edit?usp=sharing
• lvanderlinden

  February 2013 edited 5:10AM

  Hi,

  Making variables global is only useful for future use within another inline_script item. For future use of a given variable in the interface (such as feedback items, but also, importantly, your logger item), you should set the variable like so:

  exp.set("moy", moy)

  After doing so, the square-bracket method in the interface will work.

  As Wouter also pointed out, more info about getting and setting variables can be found here:

  • http://osdoc.cogsci.nl/usage/variables-and-conditional-qifq-statements/#getting-and-setting

  Does this help?

  Best,

  Lotje

  Did you like my answer? Feel free to
• boris

  February 2013 edited 5:10AM

  It works perfectly. Thank you very much !

  The idea that you need to separate "inline" and "graphical interface" is not easy to get for beginners...

  Then I had a new very naive problem:
  I want to have an "if statement" in my inline

  I wrote:
  

  
  
  global CountMot, Somme, Moy, CountJuste
  
  Somme = Somme + self.get('response_time')
  
  CountMot = CountMot + 1
  
  if exp.get('correct') == 1
  
      CountJuste = CountJuste + 1
  
  

  and got
  SyntaxError: invalid syntax on my if statement
  I tried various things but nothing worked.
• lvanderlinden

  February 2013 edited 5:10AM

  Hi Boris,

  The first line of your if-statement should end with a colon, like so:
  

  if exp.get('correct') == 1:

  For more info on conditional statements in Python, see:

  • http://docs.python.org/2/tutorial/controlflow.html#if-statements

  Did you like my answer? Feel free to
• boris

  February 2013 edited 5:10AM

  Thank you !