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[open] when keyboard response is active

edited November 2014 in OpenSesame

Hi,
I want to run a TOJ task and I want the participant to be able to press the response button
even if the audiovisual stimuli (video) is not finished.
Until now the video has to finish and then, when the fixation dot appears,
the participant is able to press the response button.
Because of the TOJ, I am interested mainly that the participants watch the begining of the video.
Also many participants has the urge to press the button as soon as they have decided which the correct answer is (which is immediately after the beggining of the video).

The experiment design is :

  • fixation dot (sketchpad)
  • video-vlc plugin (this is the section where I want participants to be able to answer)
  • fixation dot (sketchpad) (this is the section where participants are able to answer for now)
  • keyboard response
  • logger

Thanks,
Stella

Comments

  • edited 10:17AM

    Hi Stella,

    Have you tried simply setting the duration of the media_player_vlc item to 'keypress'? That way the video will stop and the response variable will be set to the key that was pressed. In other words, the media_player_vlc item will function as a basic response item.

    Hope this helps!

    Sebastiaan

    There's much bigger issues in the world, I know. But I first have to take care of the world I know.
    cogsci.nl/smathot

  • edited 10:17AM

    I have set it on "keypress" but the problem is that with this design that I have described above when the participant presses the response button while video is playing, the sketchpad with the fixation dot appears and even though it is set on 100 msec it does not go away until you press again a response button.

  • edited 10:17AM

    If you set the media_player_vlc's duration to 'keypress' and use a keyboard_response item, you will have to press a key twice, because both items wait for a keypress. So it's an either-or situation: Either you use a 'keypress' duration, or you use a keyboard_response item.

    What do you want the behavior of your experiment to be exactly? What should happen if the participant presses a key during video playback? And what should happen if the participant presses a key only after the video has ended? Once you have a detailed description of the possible scenarios, you can decide how to implement them.

    Cheers!
    Sebastiaan

    There's much bigger issues in the world, I know. But I first have to take care of the world I know.
    cogsci.nl/smathot

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