help needed on visual search

[David McFarlane]

maayan,

#1 & 3 strike me as the same question:  E-Prime Lists have settings 
for exiting after either a number cycles, a number of samples, or a 
number of seconds, but they cannot apply combined exit criteria 
(e.g., 40 samples *or* 300 sec, whichever comes first).  In that 
case, I would set the List to exit after a number of cycles or 
samples, and then use InLine code within the trial Procedure to test 
for the time limit and exit the List with List.Terminate.  That's 
just an outline, maybe someone else can help with the details.

No help for #2, sorry.

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

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At 12/12/2012 11:41 AM Wednesday, maayan kedar wrote:
>like almost everyone - i'm new on E-Prime! and, I want yo apologize 
>for bad English too, thanks.
>I have 3 main problems on my visual search project:
>
>1. I have a list of 20 trails. I want to run each trial 2 time max, 
>because the participant have only 5 minutes for 40 trial if he/she 
>will be fast enough.
>the problem is that for all the options i tried (like random with 
>replacement) he always takes some trials more than 2 times. what do 
>i need to do?
>
>2. I set my lists so in every trial I suppose to have 99 distractors 
>and 1 target (the letter B for example). The thing is that sometimes 
>he dose not show the letter. when I check the data I can see that 
>the letter was suppose to be on line 15, let's say, but the letter 
>is not there!!! How come? and again - what can I do?
>
>3. I know it's silly but - How do I limit my experiment to 40 trials 
>or 300 sec? I tried to set the exit from the main list after 300 sec 
>but it didn't work.
>
>thanks!!!!
>maayan

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