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

[David McFarlane]

Before going any further, please see 
http://www.pstnet.com/support/kb.asp?TopicID=1340 and 
http://www.pstnet.com/support/kb.asp?TopicID=5370 .

-----
David McFarlane
E-Prime training online: 
http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter:  @EPrimeMaster (twitter.com/EPrimeMaster)

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Anne-Wil wrote:
> Hi Gugs,
> 
> a quick first thought: did you indicate the correct response to be "" 
> (e.g. nothing between " 's) for the trials in which 'nothing' is the 
> correct response?
> 
> On Wednesday, 5 December 2012 02:55:23 UTC+1, gugs wrote:
> 
>     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
>     <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 [Ermm]
> 
>     ===================
> 
>     P.S. I tried to attach the file here but it was giving me issues...
> 
>     Many thanks again!

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