Hello Empirisoft Support,

I have been using DirectRT and MediaLab for several experiments, and I
have had a very positive experience. Thank you for putting together
these excellent pieces of software.

I wanted to ask you a quick question about IAT randomization in
DirectRT. I noticed that in your sample IATs ( IAT-Practice.csv and
IAT-Race.csv), you elected to use randomization without replacement. I
was just wondering if this was done consciously, and whether this type
of randomization is preferred over true randomization. I was also
wondering if you think it might be worthwhile to create separate
StimList files for every block in which the StimList is called (e.g.
adject1-1.txt, adject1-2.txt, etc.) to reset the randomization for
each block. In short, I would like to know your opinion on which of
these three randomization methods is most appropriate for the IAT (1.
randomization without replacement, 2. randomization without
replacement with multiple identical StimLists, or 3. true
randomization).

Thank you for your time.