Hello.

I'm currently building an experiment that's supposed to contain 4 blocks.
The first block contains 80 trials of type A, the second block contains 80 trials of type B, the third block contains 80 additional trials of type A and the last block contains 80 additional trials of type B.
I want the 80 trials in the first block to be randomly selected from the pool of 160 trials of that type. BUT, and here's the problem - I want the 80 trials of type B, presented in the second block, to match the 80 trials of type A presented in the previous block.
For example, if type A trials no. 14, 19, 120, 65 were presented in the first block, I want type B trials no. 14, 19, 120, 65 to be presented in the second block. In other words, I want to yoke the type B trials to the type A trials presented in a previous block.
Is that possible with Medialab?

Thanks in advance,
Niv