Hi I am trying to design a simple classification task in which participants switch between classifying a number (odd/even) and a letter (vowel/consonant). Up till now I randomize the select of the classification (whether letter or number), however, I now want to control how many trials are switch t…

Would you be happy for me to use your experiment as the basis of a public demo for this? In order to balance both switch/same trials and letter/number trials I’d use a variation on my independent randomisation demo but with two separate switch balancing lists. In the spreadsheet I’d put a letter an…

I’m also just now implementing a task-switching experiment and mostly rely on Builder. 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). Therefore, I prepare cs…

[image] 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 d…

Sure feel free to use the exp for demo. I’ll have a look at the indepentent randomization demo and take it from there, thanks.

This is an interesting way around it, more likely as a plan B for me as not well versed in R. I’ll get in touch should the above fail. Thanks for this!

Cool. Please could PM me your psyexp and spreadsheet files with it working how you want it in random order and I’ll take it from there.

I’ve just finished my trial switching demo. Trial Switching code | try it This demo randomises switch and non-switch trials in a classification task. The conditions are preloaded using a code component and allocated to two lists so that switch and non-switch trials can be balanced. The first trial …

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

Builder

wakecarter January 6, 2022, 2:21pm 4

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.

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

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