Millisecond Forums

IAT stimuli selection

https://forums.millisecond.com/Topic15492.aspx

By M - 2/6/2015

Hi,

I am programming an IAT and I would like to program it in such a way that onestimulus from the list won't be used a second time until all the rest of thestimuli have been used. The stimulus’ selection should be random (I have 4stimuli per category and 20/40 trials per block). What is the right selection modehere?  

Thanks a lot!

 
By Dave - 2/6/2015

The right selection mode is noreplace (random sampling without replacement), which is the default mode Inquisit uses. If you want to keep stimulus selection pools intact across blocks, you need to specify /resetinterval=0 in the stimulus (i.e. <text> or <picture>) elements.
By M - 2/7/2015

Hi Dave,

I indeed usednoreplace but was not entirely sure…
Thanks a lot!