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drdreidel
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Manipulate random order, Posted February 23rd, 2010 #1
I have a series of trials--each with a number of events linked to it--that I need to run in random order, but I want to prevent the trials from being run more than once in a single sitting. The events that are linked to the trials are lists, so each trial may occur as many times as there are items in the event lists (trial, 1; trial, 2; trial, 3; etc.). I need to stop these multiple occurrences and make sure each trial only appears once. Any thoughts?
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MonikaT
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Posted February 25th, 2010 #2
Are you saying you only want one event from each trial presented?
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drdreidel
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Posted February 26th, 2010 #3
Not exactly... I want every trial to be presented from each block. Since the events in those trials include lists, trials get repeated--using a different item from the event list. I want to prevent this repetition.
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MonikaT
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Posted March 1st, 2010 #4
A trial that is using an event that has stimulus lists with let's say 20 items, will essentially translate into 20 different trials at run-time. To get a clearer picture, go to the Experiment menu and select Expand Events that Use Lists.
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event, list, random, repeat, trial
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