Is it possible to randomize the location of grouped stimuli

[David McFarlane]

Sam,

This reminds me of a Theeuwes task that I wrote for someone else here 
last year, it took a fair degree of finesse that I will not go into 
here.  Since I provide this sort of support for your department, I 
will contact you and we can talk.

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


At 7/22/2013 11:36 AM Monday, Sam Hemsteger wrote:
>My lab has an experiment that flashes different colored stimuli on 
>the screen (up to 8 colors)  - in 8 spatial locations.
>In some trials there will be multiple stimuli of the same color ( 
>e.g. 3 red squares, with 5 other different colored squares).
>In one condition the stimuli will be randomly placed on the screen 
>(in a circle),
>
>HOWEVER in the other condition we want all the same colored stimlui 
>to be presented right next to each other.
>For example, all 3 red squares need to be presented next to each 
>other (but randomly generated placement) and the other colors 
>randomly placed elsewhere.
>
>Is there some kind of structural way to do this in E-Prime that I'm 
>not thinking of or would it take hard-line coding to make 
>happen?  Can anyone please help walk me through this?
>
>Thanks,
>Sam

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