Strange problem

[David McFarlane]

Thanks, this helps a little, although I still need more.  Also (1) 
you really should take this to PST Web Support, and  (2) when you 
reply here, *please* include the preceeding thread in full, otherwise 
it is hard for others (and me) to follow along later.

Anyway, I still want to know the PreRelease value, that is critical 
to my thinking.  If you are using EP2.0.8.10 then you probably use 
the default of "same as duration".  I also need to know more about 
the structure of your Procedure.  E.g., I assume that your inline 
immediately follows your WhiteDot, but I need you to confirm or 
correct that.  And please give more concrete, explicit descriptions 
of your responses, not just "correct", but what counts as correct.  I 
would like to see a better step-by-step description of what the 
subject is supposed to do on each trial, and some concrete examples 
of trial stimuli & responses.

Best if you work out a stripped-down version to demonstrate this 
issue.  But now I may not get back to this again until next week.

Best,
-- David McFarlane


At 5/2/2013 03:12 PM Thursday, Vaaal wrote:
>You are right, I wasn't clear, and plus I think that there is a more 
>easy way to explain it.
>I have a slide called WhiteDot. Assuming that I always give it the 
>correct response (ACC=1). If I read the whiteDot.ACC just after the 
>slide, the value is (most of the time but not always!) 0. If I read 
>it after some other slides, the value is 1. Of course nothing change 
>in the inline script about the ACC of the whitedot slide.
>
>The post run of whitedot slide is *afterObjectRun*, the prerun is 
>*beforeObjectRun*.
>The duration of "WhiteDot" is a random variable called DurationA. In 
>the field "Duration" I wrote [DurationA].
>-What Time Limit do you use for the input mask on whiteDot? <-I am 
>not sure I understand this one. Time Limit of the response is (same 
>as duration). The correct response is to do nothing (just to way 
>DurationA milliseconds) (actually, to be more precise, the subject 
>is asked to press a button on a previous slide, and to keep the 
>button pressed during WhiteDot. If the subject releases the button 
>there is an incorrect resposne, otherwise a correct one).
>When I say "assuming that I always give the correct response" I 
>mean: assuming that I always wait the right amount of time without 
>doing anything but keep the button pressed.
>
>Could you write and described a stripped-down program that
>exhibits this phenomenon so that we might try to duplicate it? - Yes 
>I can, but only tomorrow. Maybe you are able to help with the 
>information that I have provided you now?
>Thank you very much! :-)
>
>
>On Thursday, 2 May 2013 12:45:44 UTC+1, Vaaal wrote:
>Hi, I am experiencing a really strange problem with e prime.
>
>It is something simple like this:
>
>
>Debug.print "1 WhiteDot ACC=" & whiteDot.ACC
>
>If whiteDot.ACC=1 Then
>
>
>Debug.print "2 WhiteDot ACC=" & whiteDot.ACC
>end if
>
>What the debug print is sometimes
>
>1 WhiteDot ACC=1
>2 WhiteDot ACC=1
>
>and sometimes
>
>1 WhiteDot ACC=0
>2 WhiteDot ACC=1
>
>and sometimes
>
>1 WhiteDot ACC=0
>2 WhiteDot ACC=0
>
>
>
>Assuming that the answer to WhiteDot is always ACCurate and that if 
>I print the whiteDot.ACC in a following inline function it always 
>returns 1, i think that the problem is that  ACC value of WhiteDot 
>slide doesn't update instantly. The problem is that in the real 
>inline function  I have to do an operation if whiteDot.ACC=0, so it 
>has to be updated instantly after the slide! How can I be sure that 
>this occours?

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