Visual Stimuli with different offsets

[David McFarlane]

Hmm.  In short, you need some way to clear only one of the stimuli at 
a specified time after first presenting both stimuli.  Let's 
see...  First, set the Duration of the dual stimulus to the shorter 
Duration.  Then you could simply replace that with an object that 
presents only one of those stimuli, with its Duration set to the time 
remaining for that stimulus.  Or use an object with a judiciously set 
combination of Frame Size & Position and transparent BackStyle to 
overwrite just the one stimulus.  Or use SlideVisualStim.Clear in 
inline code to clear the one stimulus.  In any case, you then do 
something to take up the remaining time for the longer-duration 
stimulus.  Anybody have a beter idea?

If you want draw your own stimuli in E-Prime then you may use the 
Canvas object to draw whatever you like, see that topic in the 
E-Basic Help facility.  This will require some inline coding.  Please 
note that Canvas drawing operations are *far* too slow for anything 
terribly complex, but still good enough for modest use.

-----
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 3/15/2013 10:33 AM Friday, kayh wrote:
>I am new to e-prime and I am having some trouble figuring out how to 
>change duration times.
>Currently, I need to be able to have two stimuli on the same page 
>have different durations. While I know you can change duration times 
>for full pages, I have not been able to change the duration of one 
>stimuli without changing them all.
>Does any body have any solutions for this?
>
>Background information: I am trying to have two stimuli (circles) 
>have the same onset time, but their offset time be slightly 
>different. Also, is there anyway to create shapes in e-prime? or do 
>i have to import images?
>
>Any help would be greatly appreciated!! Thanks!!

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