I am building an experiment in the Builder that I would like to run online. It will start with some questions using the Forms, and then move into the experiment proper.
The experiment will consist of a few blocks of trials wherein participants have to respond as quickly as possible to one category of images (say Category A, the non-targets) and withhold their response for a different category of images (say Category B, the Targets).
I need to create it so that participants are randomly assigned such that for some participants Category A images are the non-targets and Category B images the targets, while other participants have Category B images as the non-targets and Category A images as the targets.
If I were doing this in person, it would be a simple matter of creating two experiments in the Builder and changing the spreadsheets. But is there a way to do this online? To, perhaps, branch from the very start based on a randomly generated number for example, and the experiment would terminate after the completion of the branch?
edit: or to refer to the spreadsheets based on the number? For example, generate a random number between 0 and 1, round it to the nearest (down to 0 or up to 1), and then refer to spreadsheet0 or spreadsheet1 when doing the loops. Would that work, and if so how?