Sequential blocks, randomized trials

[QVCLonline]

Hi there!

I am trying to build an experiment in the Builder where the blocks of the experiment are sequential, but the trials within those blocks are randomized. They are all in the same datasource CSV file.

I’m having difficulty doing this in the Builder, could anyone share a procedure for how this is done?

Thank you!

[wakecarter]

I do this with concentric loops. The outer loop is sequential and specifies the rows to use in the inner loop which is random.

Wakefield's Daily Tips

Avoid multiple spreadsheets One way of counterbalancing blocks in an experiment is to have an outer loop which points to a spreadsheet which contains the names of different spreadsheets to use in an inner loop. The main issue with this is that if you have multiple spreadsheets with the same columns and you want to make a change, you have to make it to all of them. The other more minor issue is that you may have to specify the spreadsheets as additional resources in Experiment Settings / Online. …