Child Friendly Calibration - Eyelink

Comments

• sebastiaan

  February 2018

  Hi Naomi,

  Right now I don't have an EyeLink to test this with, so the code below is untested. But you can override the default function to draw a calibration target. To do so, you need to write an inline_script with something like the code below in the Prepare phase.

  Then you can modify the child_friendly_target() function in such a way that it draws a Spongebob or something along those lines. Does that make sense?

  def child_friendly_target(x, y):
  
      c = Canvas()
      c.fixdot(x, y)
      c.show()
  
  
  items['pygaze_init'].draw_calibration_canvas = child_friendly_target
  

  Cheers!
  Sebastiaan

  
  
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• NaomiHavron

  February 2018

  Thank you Sebastiaan!

  I am sorry, I only saw this reply now...

  How do I modify the function to draw a .jpg or .gif? And can I control the calibration beep to be more child-friendly?

  Best,
  Naomi
• eduard

  February 2018

  Hi Naomi,

  Instead of a circle, draw an image.

  To change the calibration sound, try to add this code here to the loop Sebastiaan posted earlier.

  src = pool['bark.ogg'] # replace bark.ogg with the sound you wish and put that sound file in the file pool
  self.beep = Sampler(src, volume=.5)
  if self.var.calbeep == 'yes':
      self.beep.play()
  

  I haven't this code either, though....

  Good luck,
  Eduard

  
• NaomiHavron

  March 2018 edited March 2018

  Hi Eduard,

  Sorry for only getting to test this now - I had a few deadlines on other projects, and am now back to working on this project.

  I have tried to implement this but I just get an empty calibration (no sound and no dot/image).
  What I tried to do is to put an inline before the pygaze_init that has, in the prepare phase:

  def child_friendly_target(x, y):
      path = exp.pool[u'calib_1.gif']
      c = Canvas()
      c.image(path)
  # Element interface
      c.show()
      src = exp.pool[u'Ripple_sound_effect_edited.wav'] 
      self.beep = Sampler(src, volume=.8)
      if self.var.calbeep == 'yes':
          self.beep.play()
  
  items['pygaze_init'].draw_calibration_canvas = child_friendly_target
  

  Thanks for all your help!
  Naomi
• eduard

  March 2018

  Hi Naomi,

  I am sorry I doubt have an eyetracker to test the script myself. Maybe it works if you move c.show() to the end of the function?
  If not, I have to pass

  Eduard