pictures disappear


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emilia
emilia
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Hi,

i have a problem with a flicker task, in which 6 pictures are arranged in a circle and presented for 250 ms, then a blank screen, and then 6 pictures (only 1 is changed). this flicker goes on until response or maximum 10 times. The problem is, that sometimes, 1 or 2 pictures just disappear from the screen after a few flickers. 
In raw data are registered all the pictures until the end, without showing that 1 or 2 are missing at some point.

i can`t find why this is happening
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!corect.iqx (537 views, 28.00 KB)
exp.rar (314 views, 3.00 MB)
emilia
emilia
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actually, i discovered the problem.
is the beginresponstime (i don`t know why), but the problem is that when i delete it, the task doesn`t end when i press a valid key (even if it`s defined in the trial and in the defaults). the task keep going until the end. it doesn`t work even if set responseinterrupt = immediate
if i let the beginresponstime, i can end the task when i press a valid key, but one of my images disappear
any ideas?
Dave
Dave
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You should be able to avoid that issue by forcing an explicit reset of the <trial>'s stimulus presentation sequence /ontrialbegin:

<trial mytrial>
/ontrialbegin = [trial.mytrial.resetstimulusframes();]
...
</trial>



emilia
emilia
Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)Partner Member (639 reputation)
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Posts: 7, Visits: 86
Thanks!!! it works!!! 

yeyyy :D

You`ve been of great help, thank you so much!!

Emilia



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