Experiment design question

[George He]

Hi Todd,
This does seem to be an easy task...
You can have a drop-down at the script start-up (double click on the
first line in the left panel in EPrime) and put whatever order you might
want there. This will allow the experimenter to choose when the script
starts. Then you can have a piece of "inline" script to actually set the
order of the blocks as chosen. Just a bunch of if statements.
If you need more help, please let me know.
George
Dept. of Psychiatry
Univ. of Iowa

Todd Thompson wrote:

>Hi, all. I've got a question that I hope will be very simple, but I
>haven't yet found a convenient answer. Any help will, well... help.
>
>I'm building an experiment that has four blocks of different trial
>types (A,B,C,D). I'd like to run these blocks in one script, one after
>the other. So far, no problem. I've got several lists: 1 that
>specifies the block orders, and four more that contain the trials for
>each block.
>
>However, I'd like to be able to run the blocks in a specified order,
>depending on the subject. For subject 1, I might want to run DCAB. For
>subject 2, I might want BCDA. And so on.
>
>Needless to say, I don't want to build and maintain one script for
>each of the 24 permutations of my block order. Can you think of a
>clever solution? Is there a way to manually specify the order of lists
>at the beginning of the experiment (via parsing a text input, if
>necessary, but preferably choosing from a drop-down or radio button)?
>
>Thanks so much!
>Todd
>
>----
>Todd Thompson
>Helen Wills Neuroscience Institute
>University of California, Berkeley
>
>
>