Need to end loop immediately and not read routines

[wakecarter]

By each time the experiment runs do you mean in each block?

I would do this with an outer loop than runs 5 times.

Within the outer loop you have the coin flip

Then a loop around your first section with nReps = coin_flip
Then a loop around your second section with nReps = 1
Then a loop around a repeat of your first section with nReps = 1- coin_flip

Difficulty creating counterbalance blocks in online experiments

Do you mean randomly presenting some participants with A then B and some with B then A? If you want equal numbers of participants to be presented with each order, then you should use my VESPR Study Portal. This could be used to send a variable called group to your study with values 1 or 2. If A and B are loops then you could have three loops A1 with nReps a1, B with nReps 1 and A2 with nReps a2. Then put the following code in Begin Experiment a1 = 0 a2 = 0 if expInfo['group'] == '1': a1 …