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Thread: Sensitivity analysis said I wouldn't find an effect less than .8 but I did!

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    Angry Sensitivity analysis said I wouldn't find an effect less than .8 but I did!




    Hello!

    I ran a sensitivity analysis on G*power and it told me that for my independent samples t test (10 people per group, alpha = .05, power =.8) I wouldn't find an effect size smaller than d = 1.32.

    I then ran the t test and got a significant result with an d = 1.15

    How is this possible?

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    Re: Sensitivity analysis said I wouldn't find an effect less than .8 but I did!

    ***Whoops, the title should say less than d = 1.32!

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    Re: Sensitivity analysis said I wouldn't find an effect less than .8 but I did!


    It actually says that you will find an effect greater then 1.32 with an 80% (power) probability. You were lucky.

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