I am attempting to build an experiment and I have searched the forums for info, but cannot find an answer to my question.
My experiment involves participants watching 10 video clips, which I would like to be presented in random order, for a total duration of about 50 minutes. Now here is where I’m having trouble:
At 10 minutes after the beginning of the experiment, I would like to introduce a 30 minute period of “operant conditioning” where a countdown timer will begin running down for 60 seconds. If the timer reaches zero before a correct response, I want to introduce an sound clip to prompt the participant for a response. If the correct response occurs, I simply want the countdown to restart back at 60 seconds. I want this to occur all while the videos continue to be presented in random order. Finally, I want this conditioning to end after 30 minutes/with 10 minutes remaining of the videos.
Currently I have two blocks created; the first with the videos as individual events under one trial. The second block has two trials; one has an event that is the “silence” .wav file and the other is the “beep” that I want to run, if the correct response does not occur in the first trial.
I’m not sure if this is completely clear, but basically I am wondering how I can run audio files while these movies are being presented, with this feedback loop. I can upload the experiment if this is helpful.