Millisecond Forums

Hi,

I am not an expert at all in programming and I am trying to set up a number stroop task where I want a 50/50 % repartition of congruent vs.incongruent trials. There are 72 trials in total.
Here is part of the script I set up:

<counter congruentstimtype>
/ items = (1,1,1,1,1,1,1,1,1,1,1,1,5,5,5,5,5,5,5,5,5,5,5,5,9,9,9,9,9,9,9,9,9,9,9,9)
/ select = noreplace
/ selectionrate = trial
</counter>

<counter congruentcresp>
/ items = (48,48,48,48,48,48,48,48,48,48,48,48,49,49,49,49,49,49,49,49,49,49,49,49,50,50,50,50,50,50,50,50,50,50,50,50)
/ select = current(congruentstimtype)
</counter>

<counter incongruentstimtype>
/ items = (2,2,2,2,2,2,3,3,3,3,3,3,4,4,4,4,4,4,6,6,6,6,6,6,7,7,7,7,7,7,8,8,8,8,8,8)
/ select = noreplace
/ selectionrate = trial
</counter>

<counter incongruentcresp>
/ items = (48,49,50)
/ select = current(incongruentstimtype)
</counter>

With this I keep getting a 1/3 congruent trials vs. 2/3 congruent trials and I can't figure out why...
Could someone help me please? thanks!