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Thread: Is Chi-square appropriate for a single measurement variable with repeated measures?

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    Is Chi-square appropriate for a single measurement variable with repeated measures?




    Hi!

    I am looking at how many burrows are occupied by a skink species at eight sites across a property. Counts of the number of occupied burrows have been taken over three years and I want to know if the change in the number of occupied burrows at a site is significant over the three years ie. is there a decreasing or increasing trend in occupancy at a particular site.

    I am having difficulty working out which test to use. Given the data is categorical it seems a chi-square test would be best but the same burrows are sampled each year so the samples are not independent. I have also looked at a nested ANOVA but it seems that this would tell me if there is significant differences between the sites not changes within the sites.

    Any help would be greatly appreciated!

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    Re: Is Chi-square appropriate for a single measurement variable with repeated measure

    it seems a chi-square test would be best but the same burrows are sampled each year so the samples are not independent.
    So you have n burrows, each measured 3 times, with a yes/no outcome? If you pool the data from all sites (or, if you analyse each site separately), then you can use Cochran's Q as global test, and McNemars test for pairwise comparisons.

    With kind regards

    Karabiner
    »Jetzt kann mich der Führer mal am Arsch lecken.« (Ernst Kuzorra, 1941)

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    Re: Is Chi-square appropriate for a single measurement variable with repeated measure


    Thanks so much Karabiner, that's really helpful!

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