I continue to work on creating an experiment to be run next year via the web. It consists of a series of surveys and tasks. So far it has been very easy to string surveys together, and some of my tasks only have one block of items, so that's easy enough to add to an <expt>.
However, I have two IATs that are part of this sequence and each has several defined blocks. It doesn't appear that I can define them as an <expt> and then reference that expt name in another <expt> block. So do I have to list all the separate blocks of each IAT in the /blocks section of my top level <expt> tag? Can I somehow create some other intermediate block-of-blocks to include there instead?