OnsetTime Options in Task Events

[David McFarlane]

Jens,

Ah, I should have reminded you in my first reply that, before you 
proceed any further in this project, you must, MUST, *MUST* 
thoroughly study Chapter 3, "Critical Timing", of the User's Manual 
that came with E-Prime.  I cannot stress that enough!!!  So go do that first.

-- David McFarlane


At 4/26/2012 11:54 AM Thursday, you wrote:
>I guess I had my time audits mixed up. So what do think of delaying
>the signal in relation to the action delay? I am getting values in the
>5 ms area in action delay when I use a random duration on the
>preceding object.
>
>/Jens
>
>
>On Apr 25, 6:18 pm, David McFarlane <mcfar... at msu.edu> wrote:
> > Jens,
> >
> > Stock reminder:  1) I do not work for PST.  2) PST's trained staff
> > take any and all questions 
> athttp://support.pstnet.com/e%2Dprime/support/login.asp, and they
> > strive to respond to all requests in 24-48 hours -- this is pretty
> > much their substitute for proper documentation, so make full use of
> > it.  3) In addition, PST takes questions at their Facebook page
> > (http://www.facebook.com/pages/Psychology-Software-Tools-Inc/241802160683
> > ), and offers several instructional videos there and on their YouTube
> > channel (http://www.youtube.com/user/PSTNET) (no Twitter feed yet,
> > though).  4) If you do get an answer from PST staff, please extend
> > the courtesy of posting their reply back here for the sake of others.
> >
> > That said, here is my take...
> >
> > I take it your question is merely about the difference between
> > "TargetOnsetTime" and "OnsetTime", without regard to the new Task
> > Event feature (which I have not yet explored in detail).  In that
> > case, you may start with my essay at 
> http://groups.google.com/group/e-prime/browse_thread/thread/39e899d3457d4917
> > .  From that you should conclude that TargetOnsetTime is merely an
> > internal bookkeeping value that indicates only when stimulus
> > presentation is scheduled to start, regardless of when presentation
> > does start.  OnsetTime indicates when presentation does start, so
> > offhand I would think that you want triggers to happen relative to
> > OnsetTime.  An OnsetDelay of 5 ms means that a stimulus presentation
> > started 5 ms after its scheduled time (i.e., its
> > TargetOnsetTime).  If you add a delay of 5 ms from OnsetTime, then
> > your triggers should occur at, well, 5 ms after the actual start of
> > stimulus presentations.
> >
> > -----
> > David McFarlane
> > E-Prime training
> > online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
> > Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)
> >
> > At 4/24/2012 09:37 AM Tuesday, you wrote:
> > >Hi
> >
> > >I'm using EP 2.0.10.182 *Professional* with the Task Event feature and
> > >am wondering about the delay option.
> > >I am triggering a text object using the WriteByte action from a custom
> > >source drawn from an attribute in a list. Do you guys think it is a
> > >valid option to use the delay function and hold the trigger for the
> > >mean value of the onset delay received from a previous test run?
> >
> > >When I run the experiment I get a mean OnsetDelay value of ~5ms for
> > >that text object. I assume that the trigger is not adjusted and sent
> > >on the actual onset time of the text object, but delivered on the
> > >target onset time. Right?
> >
> > >So, what's your take on this?
> >
> > >Best
> > >Jens

-- 
You received this message because you are subscribed to the Google Groups "E-Prime" group.
To post to this group, send email to e-prime at googlegroups.com.
To unsubscribe from this group, send email to e-prime+unsubscribe at googlegroups.com.
For more options, visit this group at http://groups.google.com/group/e-prime?hl=en.