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Thread: Single RT with multiple stimuli?

  1. #1
    Join Date
    Nov 2005
    Posts
    3,318

    Single RT with multiple stimuli?

    [edited from support email]
    I want to present stimuli in a sequence of stimulus (250ms) and mask (800 ms). I would like to be able to tell if the participant responded to the stimulus, to the mask or to neither of them. In addition, I would like the stimuli to appear on the screen for all their pre-set duration, regardless the participant's response. How can I do it using DirectRT?

  2. #2
    Join Date
    Nov 2005
    Posts
    3,318
    [from Shira Zimerman]
    In order to keep the stimuli appear on the screen for their whole duration, regardless the participant's response, you should set min-max values in the style file (search for "MinMax" in the help index). If you want to change style for different stimuli written on the same line in your file you can use
    write the new stile number in parenthesis: <style number> in the "stim" column (search for "styles" in the help index). In order to view multiple response answers you should use the "log" data file--in there you can find the RT for each one of the stimuli written you your line (search for "Multiple response times" in the help index).
    Good luck!
    Shira

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