Go/No-Go Task Programming (David McFarlane?)

[gugs]

Hi All,
I posted a query on the e-prime discussion forum last week but haven't had 
any replies yet.  The main issue I am having in programming a go/no-go task 
is that the acc column is incorrectly returning a 0 when the answer is 
correct (but only for cases where an individual should not be responding to 
the stimulus). 

I have posted the detail here: 
https://www.pstnet.com/forum/Topic6489-23-1.aspx, but I will post them here 
as well in case someone has an idea of how to correct this.  David - I know 
you are generally answered a lot of go/no-go extended input type queries so 
I was hoping you might know.

===============

The task is fairly simple - an either emotive (i.e. happy, sad) or neutral 
word will appear on the screen for 300 ms, followed by a blank screen for 
1200 seconds (for a total of 1500 ms). The participant needs to press the 
letter g if the word is neutral or do nothing if the word is emotive. 
Pressing the key should log a response time, but should not end the 
stimulus event (i.e. the stimulus+blank screen will always run for 1500 ms 
even if the participant responds within the first 300 ms). The participant 
can respond anytime throughout that 1500 msec. I understand this is called 
"extended input" - which I have accounted for by making the time 
limit>duration.

My biggest problem that I noticed is that my RESP Acc is coming back as 0 
when the correct action is to do nothing, and the person has not pressed 
any key. Do you know why this is?

I have uploaded a simple example file showing just 4 practice trials. If 
someone who is experienced could take a look at it it would be much 
appreciated - I am all alone in my department working with e-prime and 
there is noone to really talk to here 

===================

P.S. I tried to attach the file here but it was giving me issues...

Many thanks again!

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