EEG in E-Prime: Sending triggers during a slide

[David McFarlane]

Tobias,

Try searching this group using the word "trigger", you should find a 
thread there that addresses your problem (I know, I just did this 
myself -- currently about the 5th one down, but take a look around).

-- David McFarlane


At 5/22/2012 12:00 PM Tuesday, you wrote:
>Hi there,
>
>I have the following problem: I want to show a slide for 200 ms, 
>allowing responses up to 1500 ms after slide onset. As I am doing an 
>EEG experiment, constant slide presentation time is recommended 
>which is why I set EndResponseAction to "None". Is it possible to 
>send a trigger during the 200 ms interval, i.e. in case a 
>participant pressed the button after 145 ms, there will be a marker 
>in the EEG at that point in time? I only know the procedure of 
>sending triggers with the onset (or offset) of a slide, e.g.
>
>search.OnsetSignalEnabled = True
>search.OnsetSignalPort = &HD030
>
>But that doesn't help here since the trigger would obviously wait 
>until the next slide comes no matter when I react in case I selected 
>"None" for EndResponseAction.
>
>Thanks,
>Tobias

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