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Thread: Calculating Omega Squared

  1. #1
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    Calculating Omega Squared




    Hi All

    I have been battling with my stats over the last two months and have managed, by reading books and researching the web, to stumble through t test and multiple regression.

    Now I am stuck on calculating omega squared. I have been working in SPSS and it doesnt have the facility to do this.

    Can anyone help me please?

    I would be really grateful as I am currenty tearing my hair out.

    Best wishes

    Claire

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    Quote Originally Posted by 2461c View Post
    Hi All

    I have been battling with my stats over the last two months and have managed, by reading books and researching the web, to stumble through t test and multiple regression.

    Now I am stuck on calculating omega squared. I have been working in SPSS and it doesnt have the facility to do this.

    Can anyone help me please?

    I would be really grateful as I am currenty tearing my hair out.

    Best wishes

    Claire


    Why not just use your ANOVA output and compute Omega square with a hand-held calculator...it's not that difficult.

    For example, in the context of a One-Way ANOVA it is:

    w^2 = (SSB - (k-1)*MSW) / (SStot + MSW).

    where k is the number of groups.

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    Ok - I will have a look - thank you!

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