[open] when keyboard response is active

StellaCrete

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

sebastiaan

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

StellaCrete

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.

sebastiaan

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

AngeloPisanii

Hi @sebastiaan stiaan , you explained exactly what happens to me. Basically my participants see a video (media_player_mpy with kaybord duration) and respond with a button. I have a “keyboard response” that I also need to give a feedbeck on correctness. 

Basically I would like the participants to receive the feedbeck immediately after they press the atsto once. The way it is set up now, they have to press the button twice: once to stop the video and the second time to receive the feedback. 

Could you please advise me how to do this?