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Thread: Randomization with constraints

  1. #1
    Join Date
    Nov 2010
    Posts
    2

    Randomization with constraints

    I know this has been asked before, but I did not see a response regarding DirectRT 2010. So, here goes...

    I am creating a lexical decision task and have three types of words: stereopyically "Black" (k = 6), neutral (k = 6), and nonwords (K =12). How can I randomize the words so that I do not get the same word type in a row (i.e., stereotypically Black, stereotypically Black, neutral, etc.)? Any help would be much appreciated. Thanks!

  2. #2
    Join Date
    Nov 2005
    Posts
    3,318
    Nothing has changed from DirectRT v2008 to v2010 in this respect--i.e., constraints on randomization such that you can control patterns like this. For some examples of discussion, see:
    http://www.empirisoft.com/support/showthread.php?t=689
    http://www.empirisoft.com/support/showthread.php?t=2469

    Or search on "constraint" and/or "constraints"

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