How to randomize the order of blocks between participants

MicolG

Hi,

I've been programming my experiment in Javascript (for OSWeb), and I need to randomize the order of blocks.

What should I code at the beginning of experiment in order to get my blocks randomly presented between participants?

Many thanks,

MG

lvanderlinden

Hi @MicolG ,

The simplest solution seems to:

• Nest your blocks (say, block_loop_1 and block_loop_2) in a main-level loop-sequence structure
• Define a block id in the top-level loop (and set the order to random)

• Use Run-if statements in the top-level sequence to determine which block should be run, depending on the block id.

By doing so, you don't need any JavaScript. Does this answer your question?

I attached a small example experiment.

Cheers,

Lotje

7061.osexp

MicolG

Hi Lotje,

Thanks for your help, I managed to solve this out!

Have a good day

Micol