logging onset of TMS pulse?

[David McFarlane]

Hannes,

Once again, I advise that you take this up directly with PST Web 
Support, even if only to get a second opinion -- let them do their job.

Also, look at the .OffsetSignalData, .OffsetSignalEnabled, and 
.OffsetSignalPort properties of various stimuls objects in the online 
E-Basic Help.  I have never used these myself, so I cannot provide any 
further help there.

As to setting the timing of inline code, inline code starts running as 
soon as the previous object ends.  If you want inline code to start at a 
specific time, just add a loop to provide a delay.  E.g., if you want 
inline code to proceed no sooner than 100 ms after the offset time of 
object StimText, then do something like

Dim  codeStartTime as Long
codeStartTime = StimText.OffsetTime + 100
Do Until (Clock.Read >= codeStartTime)
Loop
' inline code continues here...

As to delays in displaying visual stimuli, as explained in detail in 
Chapter 3 of the User's Guide that came with E-Prime, some delay is 
inevitable simply due to the nature of the display technology.  Please 
go back and study Chapter 3 more thoroughly.

Finally, when you do get this worked out please report back here, as I 
would like to know better how some of this works myself.

-- David McFarlane, Professional Faultfinder


On 5 May 2010 Hannes wrote:
> thank you very much David, your suggestion
>> Instead of your current inline code, try the following single line:
>>
>> c.SetAttrib "TMS.OnsetTime", Clock.Read
> 
> works. At least I can see the OnseTime.
> But there are still problems remaining: how can I precisely time the
> onset of the TMS trigger? Or to put it even more exactly: I would like
> to give the TMS pulse right at the end (= OffsetTime) of the preceding
> visual stimulus. Where can I set this timing? I did not find any hint
> in the manuals how I can set the timing of an InLine.
> Another problem is that there are certain delays in displaying the
> stimuli (as far as I can tell from the StartTime, FinishTime,
> OnsetTime, OffsetTime), even though I already set the timing to
> "cumulative" and put a prerelease...
> Is it possible at all to work very precisely in the millisecond range
> using Eprime?
> 
> Thank you very much for your advice!
> 
> Hannes

-- 
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.