Sending triggers: how to best invoke them?

[Fabrizio Ferri Benedetti]

Hi all!

Now that I've discovered how to send triggers, I'm trying to figure out 
the best way to place them inside the experiment. Placing small InLine 
scripts with a "WritePort" call is a straightforward, but unsatisfying 
solution, due to the delay between the InLine processing and the OnSet 
of the stimulus.

Apparently, placing an InLine with OnSet instructions just before the 
target object, would do part of the trick (see E-Basic help for the 
RteRunnableInputObject.OnsetSignalEnabled property). But what if I want 
to send triggers when a subject answer? I've read a message of Paul 
Groot, posted not so long ago 
(http://listserv.linguistlist.org/cgi-bin/wa?A2=ind0605d&L=eprime&D=1&P=670) 
but I wonder whether waiting for a slide to terminate is reliable or not 
for timing issues. Could I profit the OffSet instructions instead? I'll 
try...

Another mystery is what trigger generates a specific colour in the EEG 
software. The user manual of the amplifier is silent about this detail. 
And I don't think there is an ISO standard out there for EEG colour 
coding, isn't it?

Cheers,

     Fabrizio Ferri Benedetti
     University of Valencia
     http://www.uv.es/fafebe