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Thread: Trouble with incorrect responses

  1. #1
    Join Date
    Nov 2005
    Posts
    3,328

    Trouble with incorrect responses

    [edited from support email]
    We are creating a Stroop Task that will require participants to hit the correct response before proceeding to the next trial. We created the stroop file and included an incorrect.txt file in the session folder. When we run the file, the session ends as soon as we provide the incorrect response rather than just displaying the X and the target stimulus until we get it right. Do you know what we're doing wrong?

  2. #2
    Join Date
    Nov 2005
    Posts
    3,328
    Two things. First, you need to actually list the incorrect responses as valid keys, otherwise DirectRT will ignore them. So, for example, instead of:
    Code:
     
    rt:203
    rt:205
    rt:208
    rt:200
    try:
    Code:
     
    rt:203,200,205,208
    rt:205,200,203,208
    rt:208,200,203,205
    rt:200,203,205,208
    That would explain why you don't get the X. The other question is why it is ending. I think it's because you have a conflict--on the one hand you are asking that a correct response be given no matter what. On the other hand yoiu have a min-max value in your style file of 50-3000! indicating that the trial should continue after 3000ms, no matter what. In fact, if you change the min-max value to simply 50-3000 (i.e., no "!"), or 0, then the problem goes away. Let me know if that resolves it.
    -Blair
    Last edited by jarvis24; 10-02-2006 at 07:42 PM.

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