sending trigger to other devices locked on to the time of response

[David McFarlane]

Well, here's the deal.  That solution is too 
involved for me to write out as a post to the 
Group.  But I have it all arranged in a very nice 
demo program.  But I cannot let myself become a 
curator for a library of demo programs (I have 
more than this in my growing collection).  So, if 
someone can send me instructions for how to 
upload my demo program file to a place where 
*everyone* can download it from then on, then I 
would be very happy to share that and more with the community.

-- David McFarlane, Professional Faultfinder


>Dear Professional Faultfinder,
>
>Thanks for posting your script!
>In my experiment the response comes after the offset of the target
>stimulus.
>If it is not too much of a trouble, I would appreciate to hear about
>your
>solution to presenting other stimuli during the response period.
>
>Thanks again!
>
>
>On 9ì›”3ì ¼, ì˜¤ì „4ì‹œ08분, David McFarlane <mcfar... at msu.edu> wrote:
> > Good timing -- It just so happens that I have been working on this
> > very issue for a lab here.  You have to make the proper settings in
> > your stimulus, and use a bit of inline code following the
> > stimulus.  Here is the fully-commented inline code for my solution:
> >
> > '/----------------------------------------------------------------------
> > ' We wish to present a stimulus (in this case, StimText), get a
> > ' response during that stimlus, and raise a signal as soon as the
> > ' subject responds.
> > '
> > ' To do that, we need to run this inline code during StimText.  We
> > ' could simply set the Duration of StimText to 0 or so (depending on
> > ' considerations such as leaving some time between stimulus .OnsetSignal
> > ' and .OffsetSignal) and then our code would have to also handle
> > ' further stimulus timing.  But with judicious use of Duration and
> > ' PreRelease, E-Prime will automatically take care of stimulus timing
> > ' for us.
> > '
> > ' So instead we simply set the Duration of StimText as desired (which
> > ' as a result automatically determines the target onset time for the
> > ' next stimulus object), and we set the PreRelease of StimText to a
> > ' suitably large value (preferably >= Duration, but perhaps less due
> > ' to other considerations as mentioned earlier).  Now this code will
> > ' start to run soon after the onset of StimText, and handle the
> > ' reaction to the subject response.
> > '
> > ' Finally, this code simply makes use of .IsPending() to detect the
> > ' response (see the InputMask.IsPending topic in the online E-Basic
> > ' Help).  Note that as a result StimText will last at least as long
> > ' its input mask Time Limit, regardless of its Duration (if you just
> > ' keep Time Limit at the default of "(same as duration)" then this
> > ' will not pose a problem).
> >
> > Const  LptDataPort as Integer = &H0378  ' adjust this for your system
> > Const  SignalData as Integer = &HFF  ' adjust this for your device
> > Const  LoopDelay as Long = 2  'ms; set as small as possible for your
> >          ' system
> >
> > Do While StimText.InputMasks.IsPending()
> >          ' Some slower machines (such as my 
> home laptop) need a delay so that
> >          ' EP can detect & handle input:
> >          Sleep LoopDelay
> > Loop
> > WritePort LptDataPort, SignalData
> > '\----------------------------------------------------------------------
> >
> > This is fine as long as you limit the response to coming during the
> > stimulus.  If you want to present a train of stimuli during the
> > response period then you must do a little more.  I also have a
> > solution for that, but it is rather intricate and too much trouble to
> > go into here, so I hope this is good enough for now.
> >
> > -- David McFarlane, Professional Faultfinder
> >
> > At 9/1/2010 02:38 AM Wednesday, Jaeyong Lee wrote:
> >
> >
> >
> > >I was wondering if there is a way to send trigger signals locked on
> > >the response time.
> >
> > >For instance,
> >
> > >Stim.OnsetSignalEnabled = True
> > >Stim.OnsetSignalPort = &H378
> > >Stim.OnsetSignalData = 1
> >
> > >WritePort &h378, 0
> >
> > >the above code send triggers at the onset of the object "Stim".
> >
> > >However, I am trying to figure out a way to send triggers at the time
> > >of response of "Stim".
> >
> > >I would greatly appreciate all tips and advices from you.  Thanks.

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