randomizing on distributions
randomizing on distributions
Hi,
I am trying to create an experiment that will link a distribution to a specific list of words. I want one word to be presented 5 time, one 3 and the other three words once each.
For example the words are apple, orange, pear, grape and peach.
For one participant peach would appear 5 time and in another only once. the same would hold for all of the words.
I want the order of presentation of the words to be random, as well as the distribution assignment.
I would like the assignment of the words to distribution to be random, but I have not been able to figure out how to do so.
Is such a situation possible in DirectRT?
Try this:
Create a stimlist with the 5 words and call it something like mylist.txt.
On the first trial, randomly draw one from the list, using $mylist. Then add 4 trials that repeat that stimulus, using the syntax like ?b1t1s1 (see link below for repeating a particular stimulus on a subsequent trial)
On the sixth trial, randomly draw another word from the list using $mylist. This time add just 2 trials that repeat that stimulus, using the syntax like ?b1t6s1.
Finally, add 3 more trials--each randomly drawing from the stimlist, using $mylist. These will each be presented just once.
Finally, assign all the trials a WGR value of 1 to randomize their order.
Take a look at the section on "using previous stim" in the users guide:
www.empirisoft.com/directrt/help/directrt_samples_of10_using_previous_stim.htm
Let me know if you have any trouble with it.