[open] Response time collection during video playback

Comments

• durk

  March 2015 edited 10:59PM

  Quick update: It does look like response information is collected as advertised; however the keyboard event are not passed to opensesame when the experiment is run in "windowed" or "quick run" mode. Mouse events are handled as expected.

  I'm still not seeing any reaction times in the log file though. After some tinkering and tweaking with the media_player_vlc.py code, I did manage to log the key code, and I've added a couple of custom lines of code to get the reaction time, so my student can start her experiment without delay (I hope; we still need to test this on a windows machine). Still, I would be interested to hear some further thoughts on this.

  Cheers,
  Durk
• refuzee

  March 2015 edited March 2015

  Hi durk,

  did you try putting a key logger after the vlc player plugin ?
  So far I myself did only collect response times after the video which is a more straightforward approach.

  Did you try setting the video duration to mouseclick and adding a key_response item afterwards ?

  Sorry I don't have a testing possibility atm.

  --

  edit:

  I guess there is no out of the box solution for this.

  An idea would be to call custom pycode on the keypress event, check if the pressed key is the correct one, stop playing and take this key as response. response time for this should be logged.

  e.g., edit this idea from the help
  Custom event handling

  If you want, you use your own code to handle keypress and mouseclick events, which should be entered in the edit field. The PyGame event is passed as 'event'. For example, in order to register if the spacebar is pressed or if a mousebutton is clicked, you enter:

  if event.type == pygame.KEYDOWN and event.key == pygame.K_SPACE:

  best,
  daniel