[open] how to flush responses on serial response box

Comments

• sebastiaan

  September 2014 edited 5:32PM

  Hi Tamara,

  The SRBox plug-in flushes automatically when you call the start() function, so that is unlikely to be the problem here. What comes to mind is that the first button may, on occasion, still be pressed when the script is executed, thus triggering a response. The SRBox plug-in doesn't require a new button to be pressed, but will also respond to buttons that were already pressed when get_button_press() was called.

  Could that be it?

  Cheers,
  Sebastiaan

  
  
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• tlacourt

  October 2014 edited 5:32PM

  Hi Sebastiaan,

  Thanks for your quick reply!
  Your explanation makes sense. However, I would very much like the SRBox plug-in to respond only to button presses that are started after the script is executed. Is that possible?

  thanks,
  Tamara
• sebastiaan

  October 2014 edited 5:32PM

  Hi Tamara,

  You could pause the experiment while any button is pressed, at some point before you collect the response. This will require a bit of Python inline_scripting. I don't have an SRBox here to test, but something like this should do the job:

  # Loop until no button is pressed
  while True:
      t, l = exp.srbox.get_button_press(timeout=1)
      if l == []:
          break
  

  See also:

  • http://osdoc.cogsci.nl/devices/srbox/

  Note that any delay due to waiting for a button release will not be taken into account in the response time as determined by the srbox plug-in!

  Cheers,
  Sebastiaan

  
  
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