ensuring an even and random distribution


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mlleng13
mlleng13
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Hello,

My current experiment is being programmed to be used on the Millisecond server. I have 6 potential conditions into which a participant may be placed. I have 6 experiments all of which are set up using "/subjects = (integer of 6)". My experiment requires screening questions. If the participants do meet them the experiment is terminated.

These questions are included in the same script as the rest of my experiment, therefore the subject ID is determined before it is determined whether or not a given participant is even eligible for the experiment.

 I am concerned , even though subject ID numbers are being generated randomly, that I will not end up with an even distribution of participants in my conditions (so far my pilot data ended up with only 1 of 20 subjects in one of my conditions). I just want to make sure that there is not a better way to be assigning the conditions that will ensure a more even distribution.
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