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<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff
size=2>David,</FONT></SPAN></DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff size=2>We
tried this in our own MEG system and were never successful with respect to
accuracy. The keyboard itself is terrible enough with timing, but then the
problems you mention emerge. What response device are you using? I'd
think not an actual keyboard in the shielded room - perhaps you use the
Lumitouch optical device that maps to the keyboard? If so, what we did was
have our engineer directly map that device to the MEG external stimulus/response
inputs, while preserving the keyboard mapping for eprime. I don't think
you'll ever be able to achieve what you want while still preserving accurate
timing, but let me know if you think of another clever
solution.</FONT></SPAN></DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff size=2>Don
Rojas, Ph.D.</FONT></SPAN></DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff
size=2>Neuromagnetism Laboratory</FONT></SPAN></DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff size=2>U. of
Colorado Health Sciences Center</FONT></SPAN></DIV>
<DIV><SPAN class=612592317-02082006><FONT face=Arial color=#0000ff
size=2>Denver, CO 80220</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
eprime@mail.talkbank.org [mailto:eprime@mail.talkbank.org] <B>On Behalf Of
</B>David Hairston<BR><B>Sent:</B> Wednesday, August 02, 2006 10:36
AM<BR><B>To:</B> EPRIME@mail.talkbank.org<BR><B>Subject:</B> online trigger of
keybaord responses<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I would like to get an externally
triggered record of a keyboard press for use with an MEG
system.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Is there a way to get a
time-locked onset signal or “trigger” of a keyboard/mouse response at the time
it is made, similar to the .OnsetSignalEnabled property for runnable objects,
even if the current object is still executing?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Ideally I’d like to have access to
the accuracy of said response, evaluate it and send an external digital signal
signifying this… but just getting a signal out at all would be
workable.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I know it can be done easily AFTER
the target object has occurred, for example something like “if rresponse.ACC =
1 then WritePort &378, 1”.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">However, this is only (relatively)
time-locked w/ the response in the case where the response terminates the
object; in the case of a fixed-duration with recorded response, the
evaluation/trigger would not occur until afterwards, and hence somewhat later
than the actual response time.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Does anybody have some insight on
a trick to get this?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">W. <st1:PersonName w:st="on">David
Hairston</st1:PersonName>, Ph.D.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">ANSIR
Lab</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Dept of
Radiology</SPAN></FONT><o:p></o:p></P>
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<st1:PlaceType w:st="on">Forest</st1:PlaceType> <st1:PlaceType
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style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">(336) 716-7160
(Offiice)</SPAN></FONT><o:p></o:p></P>
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