Oddball Paradigm

Hello all,

I am trying to create an Oddball paradigm for my research. I have 2 video clips. Currently i am able to set the probability of the clips. One’s probability it 80% other’s is 20%.

But i do not want to less probable one follow less probable one.

Is there any way to fix it?
Thanks very much in advance…

One option would be to insert a low probability clip randomly in a set of three trials and then follow this set with a high probability clip before starting again.

Have a loop at Complex Randomisation and Randomisation without repetition as two approaches in my PsychoPu online demos