audio + video different onsets

[David McFarlane]

SK,

Adding to Bjørn's response with more info on 
terminating both with a button press...  Set it 
up so only the sound gets a response, not the 
image.  Set the response Time Limit to 2000, and 
End Action to Terminate.  As I understand, a 
response will then terminate all running display 
objects (though I did not run a test myself, so I hope this works).

-- David McFarlane, Professional Faultfinder


At 7/17/2008 05:20 AM Thursday, Bjørn Sætrevik wrote:

>Hi SK,
>
>if I understand your problem correctly, you should be able to do this
>by having a procedure with one object with a duration of 500 ms that
>starts the sound file, but has the property "Stop after" set to
>"No" (this allows the sound to continue playing although the object
>terminates), followed by a 1500 ms object for the picture display.
>
>I hope this helps,
>Bjørn Sætrevik
>
>On Jul 16, 10:33 pm, Ben Meyers <benjamin.d.mey... at gmail.com> wrote:
> > That's an interesting problem and not one I'd actually know how to
> > solve in e-prime.  It may be possible that one of the experts in this
> > group can give you a solution using just e-prime.
> >
> > But, I would solve it by splitting my  sound files in two pieces.  500
> > ms first section, and allow some prerelease time for the image which
> > I'd place right after that, then play the 1500 ms second section.
> >
> > I don't know if that would be possible with the type of .wav files
> > you're playing, but I don't think it would be noticeable by the
> > participants.  You'd have to test it out.
> >
> > On Jul 16, 8:30 am, SK <sahy... at gmail.com> wrote:
> >
> > > Hi,
> > > I'm new to E-prime and having a problem with timing of stimuli
> > > presentation.
> > > In each trial of my experiment, a sound file will be played and an
> > > image file will be presented while the sound file is still being
> > > played. Suppose there's a 2000 ms sound file - if I'd like an image
> > > file to start at 500ms, what should I do? I also want the two stimuli
> > > to be terminated at the same time as soon as the subject hits a
> > > button.
> > > Can anyone shed light on this problem?
> > > Thank you for your help in advance.
> >
> > > SK



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