Displaying a stimuli for a random amount of time

[David McFarlane]

Without knowing any more details, offhand I would just add a list of 
duration values to a List, set that to run in random order, and then 
use those values as an attribute reference for Duration in the 
stimulus object -- i.e., if you name the List attribute "StimDur", 
use "[StimDur]" in the Duration of the object.  Beyond that, I might 
put the durations in a nested List -- see the nested List tutorial in 
Appendix C of the User's Guide that came with E-Prime.

If you have not already, you should first work through *all* of the 
tutorials in all the manuals that came with E-Prime, it will save you 
(and others) a lot of trouble.  See also 
https://groups.google.com/d/topic/e-prime/VCXgOWjKtCg .

(BTW, as far as terminology goes, "stimuli" is the plural form, 
"stimulus" the singular -- so, either "displaying a stimulus" or 
"diplaying stimuli".)

Best,
-----
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 1/28/2014 09:19 AM Tuesday, Mark Versella wrote:
>Hi all, hoping to get some help with a small hiccup that I've been 
>experiencing in putting together my program in Eprime 2.0. I'm a 
>novice when it comes to working with this software, so pardon my use 
>of any incorrect terminology.
>
>What I'm trying to do is display a stimuli for a random amount of 
>time, within a set range (1 to 3 seconds). The task I'm programming 
>calls for a variable inter-trial interval, and I'm not sure how 
>exactly to write that in. Any guidance on how to do this through the 
>tools Eprime provides would be much appreciated (as I have very 
>limited experience working with syntax), but if the only option is 
>to write this in manually, that would be fine too. Thanks so much!

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