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video and audio stimuli presented simultaneously

Nick00004 — Mon, 26 Jan 2015 11:38:13 GMT

Hello,
I have an experiment that needs to randomly play short video clips while participants are provided with audio instructions at the same time. Importantly, I'd like to have these instructions - one set per video presentation - to appear at random as well. Is there a thread out there which can help get me started?

Many thanks -

Nick

RE: video and audio stimuli presented simultaneously

Nick00004 — Mon, 26 Jan 2015 11:38:13 GMT

very much helps. thanks, Dave

RE: video and audio stimuli presented simultaneously

Dave — Mon, 26 Jan 2015 11:36:06 GMT

It works the same as with any other stimuli. Define your <video> element(s) for the visual clips, define your <sound> element(s) for the audio instructions (use <video> for audio instructions too if you are using any compressed audio format such as mp3). Have your <trial>(s) display both:

<trial mytrial>
/ stimulusframes = [1=myvideoclip, myaudioinstructions]
...
</trial>

<video myvideoclip>
...
</video>

<sound myaudioinstructions>
...
</sound>

If you want to pair certain video items with certain audio instruction items, see the "How to display stimulus pairs" topic in the Inquisit documentation. Hope this helps.