+ Reply to Thread
Results 1 to 2 of 2

Thread: Need help figuring out which test to use!

  1. #1
    Points: 6, Level: 1
    Level completed: 11%, Points required for next Level: 44

    Thanked 0 Times in 0 Posts

    Need help figuring out which test to use!

    Hi there!

    I have a data file with the following information: pre-intervention depression score (t1), post-intervention depression score (t2), t1-t2, and grade level (Freshman, Sophomore, Junior, Senior). How can I compare t1 across grades, t2 across grades and change in depression score across grades? My best guess would be to do an ANOVA comparing t1, another ANOVA comparing t2 and a third ANOVA comparing t1-t2, but that sounds like too many tests. Is there a test that can do all of this at once (such as a two-way ANOVA)?


  2. #2
    TS Contributor
    Points: 17,775, Level: 84
    Level completed: 85%, Points required for next Level: 75
    Karabiner's Avatar
    FC Schalke 04, Germany
    Thanked 640 Times in 602 Posts

    Re: Need help figuring out which test to use!

    In a repeated measures ANOVA (or "mixed" ANOVA) you can include time of measurement as within-subject factor and grade as between-subject (grouping) factor. The time*group interaction will be of partiular interest.

    But if you specifically want to compare depression at baseline between groups, you'll have to perform a separate oneway ANOVA.

    With kind regards

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

+ Reply to Thread


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Advertise on Talk Stats