Alternating tasks depending on subject ID

URL of experiment:

Description of the problem:

At the moment, I present participants with a set of instructions and then a, followed by different instructions and a variation of the does (B) and the same again for a different task (C).

Tasks two and three can have left-handed or right-handed version. The details are not particularly important. I simply want to keep instruction block one followed by experiment one. And then present a sequence of either two different left-handed does or two different right-handed tasks. As I said at the moment I have two separate experimental programs, but I wonder if there is more efficient way of doing this?

Any help at all is appreciated!

Personally, if the experiments are similar, then I would select the appropriate material based on int(expInfo[‘group’]) or int(expInfo[‘participant’])%2+1 which would take values 1 or 2 using my VESPR Study Portal