Eprime triggers to EEG out of sync

[Matt Ku]

aldelfino於 2012年8月14日星期二UTC+8下午9時37分58秒寫道：
>
> Hello everyone,
>
> I'm running an experiment using triggers from Eprime to a BrainVision 
> equipment. I need Eprime to send a trigger according to the position of 
> target-words along the sentence e.g. at 0, 5, or 11 seconds after the 
> beginning of the sentence. I tried used the following script:
>
> WritePort &H378, c.GetAttrib("trigger") 'identifies the item’ 
>               sleep  c.GetAttrib ("delay") 'identifies the position of the 
> target-word after the beginning of the sentence’ 
>               c.SetAttrib  "CheckResponseTime", Clock.Read
>
> I defined two attributes: (i) trigger, as a code to identify the trigger 
> according to each sentence, and (ii) delay, as the time after the beginning 
> of the sentence the trigger should be sent to BrainAmp. After listening 
> each sentence, the subject has to answer a yes-no question to check 
> understanding. The problem is that the BrainVision cannot register the 
> trigger synchronized with the delay attribute, but only with the time the 
> subject hits the answer button.
>
> Does anyone have a solution or an alternative script for my experiment?
>
> Thanks in advance

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