Track trigger timing

[Michiel Spape]

Hiya,
What you're saying doesn't sound like anything E-Prime should omit. The only reason I can see your data is not being saved is that for some reason, these lines are skipped. There can be many reasons for this (say, a button-press causes a goto to fire), but what you would need to find out is whether you are actually logging anything. That is, just move the inline thingy forward/backwards along the procedure and see whether anything is logged. I'd also recommend shortening the line to 
c.SetAttrib "PulseOnset", clock.read 
so that you don't even have to declare any variable. 

One question though: is _nothing_ being saved, or is PulseOnset found somewhere in your edat file, but with nothing in there? If the former, then the line is presumably skipped (as i had assumed based on what you write). If the latter, then a number of other things may be going on (e.g. it's saved under a sub-trial level thus easily overlooked). 

One final thought: I'd first get everything running, THEN start thinking about adding TMS triggers and whatnot. It's far easier to add advanced bits to the working basics than vice versa. Can you, for instance, get a Stroop experiment (or any of the tutorial experiments) running with a c.SetAttrib "MyExtraLoggedData", clock.read added? 
cheers,
Mich

________________________________________
From: e-prime at googlegroups.com [e-prime at googlegroups.com] On Behalf Of Evelina Tapia [evelina at illinois.edu]
Sent: 04 January 2011 18:13
To: E-Prime
Subject: Track trigger timing

Hi,

I am creating an experiment where a TMS is triggered at various points
during a trial sequence (where several stimuli are presented). I have
InLine code at the very beginning of the experiment that randomizes
the onset of the trigger. What I want to be able to do is to timestamp
the execution of the trigger -- in other words, I want a timestamp
when the line of code in InLine for trigger TMS is begun/completed and
I want to log that data together with other information in the
final .edat file. For that purpose I have declared 2 global variables
"PulseOn" and "PulseOff" under the User tab in the Script window. In
my InLine code right after trigger is executed (and I know that the
trigger works just as it should) I have added

PulseOn = Clock.Read
c.SetAttrib "PulseOnset", PulseOn

and similar code is placed after the port is turned off for trigger
offset time stamp. However, when I run this code, the variables
PulseOnset/Offset are not saved in the data file. I have also tried to
use c.Log in this InLine but then only one line of data (one trial) is
saved and although trigger onset/offset are marked, there is no more
any data about the objects presented during the trial.

In the documentation I have found that "a variable must be set as an
attribute of the context object in order to be logged in the data
file" so I assume that the issue here is that PulseOn/Off aren't
really "attached" to any object in the experiment... Is there a way
around that? Or another way to log the onset/offset of the trigger?

THANK YOU!

Evelina

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