how to display 20 stimuli, then give break, then continue on with next 20, then give break, etc.

[David Vinson]

One way is to create an unreferenced "Break" object and then use inline 
code to run it only in certain conditions (e.g. trial mod 20 = 0).
See the sample experiment "Insert A Pause" on PST's site:
http://www.pstnet.com/support/samples.asp?Mode=View&SampleID=33

It's also possible to do the same thing by including the Break display 
in your main trial procedure, followed by a Label.   Add an inline 
object before Break display to test sample number and "goto labelname" 
if it does not meet your desired conditions (thus skipping the break 
except when conditions are met for it).   Not entirely elegant but very 
easy to implement.

best,
DavidV



On 08/03/2013 00:16, LKem wrote:
> I'm presenting sentence stimuli and have over 100, which I want to 
> present sequentially, in the order entered into the e-prime list object.
>
> I would like to give subjects a break every 20 items.
> Thus, they would read items 1-20, then have a break,  then they would 
> continue on with the next 20 stimuli (now pulling items 21 - 40), then 
> have a break, then read items 41 to 60, then have a break, etc.
>
> I cannot figure out how to build in such a break, short of running 
> each group as a separate experiment (in which case, I'd have to 
> combine the data files from each separate experiment).
>
> Any suggestions?  I'm not great at programming from scratch, but may 
> be able to take someone else's script (doing something similar) & make 
> it work in my experiment.
> Thanks.
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-- 
David Vinson, Ph.D.
ESRC Research Fellow
Cognitive, Perceptual and Brain Sciences Research Department
University College London
26 Bedford Way, London WC1H 0AP
Tel +44 (0)20 7679 5311  (UCL internal ext. 25311)


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