How to implement equal no. of switch and non-switch trials

[wakecarter]

@holmit

Usually, it is dfficult to generate constrained randomization online, since you may run into a dead end (the next trial must be type X, but all trials of type X have already been used up).

You may be interested in my new Randomisation without repetition demo. I deal with the dead end issue by adding additional trials if the experiment is about to get stuck. It’s not a perfect solution, but I wanted to present an alterative to the approach of preloading the trials and reshuffling until the order passes the criteria.

PsychoPy Online Demos

If you have routines or experiments that are likely to be useful to others, please create a post in this thread, editing your post to add new demos so there is one post per creator. Ideally set your demos so they can be tested without consuming a credit (if you don’t have a site license) by adding a final routine that can’t end, disabling save incomplete results and adding a small number of credits. Please do not discuss the demos in this thread or create more than one post unless you have a la…