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Thread: Collecting Single or multiple response

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  1. #1
    Join Date
    Sep 2007
    Posts
    18
    Actually no.
    The visual stimuli is presented and on the screen during the tapping phase.
    Participants would see a problem on the screen (visual stimuli) and finger tap to tones until they make a decision regarding the visual problem on the screen.
    They would press on a key to indicate that the answer to the visual problem (60,61,62,63,64,65,66,67,68,87,88) any time during the 32 seconds of finger tapping. Answering the problem would then "jump" the participant from the rest of the finger tapping to that visual problem to start the next visual problem and tapping again.
    I want to record both the keyboardpresses for the visual problem and that for for the tapping. While the keyboard press for the visual problem would "jump" participants after they solved the problem.
    Please help.

  2. #2
    Join Date
    Nov 2005
    Posts
    3,328
    If I understand correctly, you could present the image as the first stimulus and for a time value of 0ms. Then present the 32 sound stimuli on the same trial, each with the time value:

    rt:50,51,52,53,60>-2,61>-2,62>-2,63>-2,64>-2,65>-2,66>-2,67>-2,68>-2,87>-2,88>-2

    And where the min-max value for the style of the trial is 0-1000! so that if no response occurs to a tone within 1000ms, the next tone occurs and so on. The negative skip values indicate that DirectRT should skip out of the trial immediately because a response to the visual stimulus has been given.

    Does that help?

  3. #3
    Join Date
    Sep 2007
    Posts
    18

    Works like a charm

    Thank you very much- That worked for the responses. The (-) trick works for jumping and maintain a "full" maximum fixed interval.

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