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Group: Forum Members
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Hi Folks,
--I have 2 versions of each stim.
--Participants should only ever get 1 of the versions of each stim.
--Participants should get 50% of Version 1 and 50% of Version 2 (ie: half the participants get the alternate version).
--AND THIS IS THE BIT I NEED HELP WITH: For all participants, the first stim they get should always be a randomly selected Version 1 stim. This stim should not be repeated later.
Here's how I've done everything except the last point above (s=Version1, ns=Version2):
<variables>
/ group = (1 of 2) (sit1=s1, sit2=ns2, sit3=s3, sit4=ns4, sit5=s5, sit6=ns6, sit7=s7, sit8=ns8, sit9=s9, sit10=ns10,
sit11=s11, sit12=ns12, sit13=s13, sit14=ns14, sit15=s15, sit16=ns16, sit17=s17, sit18=ns18, sit19=s19, sit20=ns20)
/ group = (2 of 2) (sit1=ns1, sit2=s2, sit3=ns3, sit4=s4, sit5=ns5, sit6=s6, sit7=ns7, sit8=s8, sit9=ns9, sit10=s10,
sit11=ns11, sit12=s12, sit13=ns13, sit14=s14, sit15=ns15, sit16=s16, sit17=ns17, sit18=s18, sit19=ns19, sit20=s20)
</variables>
Many thanks in advance!
paul
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