Setting triggers at specific time points after stimulus onset

[David McFarlane]

Oh, another thread that may shed further 
light: 
http://groups.google.com/group/e-prime/browse_thread/thread/9d51831937c69e19 .

-- David McFarlane


At 11/8/2012 11:51 AM Thursday, David McFarlane wrote:
>A couple thoughts to move you forward:
>
>1) Set the Duration of your sound stimulus object to 500, then 
>follow that by any other object (e.g., Wait) with a Duration of 
>(sound_stimulus_duration - 500).  Remember, if you set Stop After of 
>the sound stimulus object to No then the sound will continue to play 
>even after the end of the sound object.
>
>2) Set the Duration of your sound stimulus object as normal, and set 
>its PreRelease to (Duration - 500) (you will have to do that 
>manually because you cannot enter calculations there, otherwise do 
>calculations in InLine and use an attrbute reference for 
>PreRelease).  Set Stop After as appropriate.  I prefer this approach 
>myself as it makes the time managment cleaner, but this scares 
>people who do not understand PreRelease.
>
>Also look at the threads at 
>http://groups.google.com/group/e-prime/browse_thread/thread/cfc3d0307d5c7fbd 
>and 
>http://groups.google.com/group/e-prime/browse_thread/thread/ef0e5a8d8b87aa0c 
>for some somewhat related topics.
>
>-----
>David McFarlane
>E-Prime training 
>online:  http://psychology.msu.edu/Workshops_Courses/eprime.aspx
>Twitter:  @EPrimeMaster (https://twitter.com/EPrimeMaster)
>
>/----
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>
>
>At 11/7/2012 11:30 PM Wednesday, Taewon Chung wrote:
>>I'm running an ERP experiment using e-prime and brainvision amp
>>
>>I would like to set triggers for a sound stimulus (four-syllable 
>>words) at a certain duration after stimulus onset (i.e. trigger 
>>after every 500 ms post stimulus onset). of course, the actual 
>>presentation time of the stimulus is longer than 500 ms.
>>
>>Is there any script or in-line for such things? Is there any way to 
>>set triggers at specific time points after stimulus onset?
>>
>>Also, is there a way to have triggers appear at specific time 
>>points by typing in certain duration for ech stimulus in the "attribute"?
>>
>>Thanks :)
>
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