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Thread: is log rank test appropriate here?

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    is log rank test appropriate here?




    Hi all,

    I am doing cognitive testing and the subjects have 20 possible trials to reach criterion (90% accuracy). In my spreadsheet, I have it laid out as Column1: treatment group, column 2:trials to reach criterion, Column3: status(whether or not they reached criterion). Is it appropriate to use the log-rank test to analyze the data in this manner

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    Re: is log rank test appropriate here?

    What is your objective here? To see if there is difference in numbers of trials taken to reach the criterion between the groups?

    Does your data have censoring i.e. are there some people who don't reach the criterion within the max 20 trials? If there is censoring, then I think log rank test is fine.

    If the data has no censoring, then you might use a logistic regression with treatment as your factor to see if there is difference between the two groups.
    Oh Thou Perelman! Poincare's was for you and Riemann's is for me.

  3. #3
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    Re: is log rank test appropriate here?


    Yes to both 1 and 2. Thanks!

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