inconsistent updating of error counting variable

[liwenna]

Hi Doron,

That sounds really weird indeed.

What are the conditions presented under the "If then" lines that
precede the elseif then line that you presented us with? If one of
those happens to be met, than the line that you're testing now will
not be executed. In a similar veign: are you absolutely positive that
all trials have the trialtype set to FaceTarget, with no typoes etc?
You probably have, but this is the only one thing that I can think of
right away that you did not yet disconfirm in your post.

If none of those than I might advice you to have the actual script
program at by one of your colleaguesm me or someone else from here.

Best,

liw



On 8 jan, 10:34, doron arbiv <doronar... at gmail.com> wrote:
> hello,
>
> i have a target slide,1000 mls in duration and has a 3000 mls time
> limit. the target slide is followed by a blank slide, 2000 mls in
> duration, which doesn't collect any response. after the blank slide i
> have a short script which says the following:
> elseif c.getattrib("TrialType")="FaceTarget" then
>      if c.getattrib("Target.ACC")=0 then FaceError=FaceError+1
>
> i present only two lines from the script, since i am only testing the
> "FaceTarget" trial type for now.
> in my test i intentionally make errors, so that the FaceError variable
> will reach 20 (there are 20 trials in a block).
> the problem is that while "Target.ACC" always shows a  "0" value in
> the edata output file, the FaceError variable sometime fails to add
> "1" to itself, as it should when "Target.ACC"=0. this happens
> approximately twice in each block of 20 trials and i have no idea why
> it happens.
>
> i have some guesses. one is that maybe "Traget.ACC" is unavailable to
> the script following the Blank slide, so that when the condition:
> " if c.getattrib("Target.ACC")=0 then FaceError=FaceError+1 " appears,
> the "Target.ACC" attribute isn't ready for comparison.
> Can you please help me with this bizarre bug?

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