Calculating and Interpreting Eta and Eta-squared using SPSS

This video demonstrates how to calculate and interpret eta and eta-squared using SPSS. Eta and eta-squared are measures of association between nominal and interval variables. The difference between eta-squared and partial eta-squared is reviewed.

[dianabackus]

I did not know what I was doing. The videos have really helped me get a better understanding for the complex data interpreted in both ANOVA calculations. I still need more lessons but I thank you for the elaborate explanations in every video. Thank You!!!

[rlew]

Clear video for those struggling with SPSS, but I think you misspoke there at timestamp 5:01, when you said that partial eta² = (SS between / (SS total + SS error)). In the denominator, it should be the sum of SS error and SS effect you're trying to estimate rather than the SS total. That's why partial eta sq is typically bigger than eta sq when there are multiple effects. It doesn't make sense to add up SS total and SS error, since SS total already includes SS error.

[bruchina]

Thanks for this video Dr. Grande, I have a question though: what is the difference between Eta, Phi, and Chi-square correlation and when is it more appropriate to calculate each of them? thank you!

[tomwasser]

Do you know of any way to put a p-value to the value of eta... there does not seem to be one generated by default.

[Desiree]

Eta and Eta-squared is not something I remember learning in undergrad at all. I am still a little confused. There is so much to learn in this course! I will have to come back to this video.

[karolinmertens]

Thanks for your video. Would you mind letting me know how to calculate the confidence interval of Eta square? Appreciate your help!

[FilbertCort]

Thank you very mouch. This video has helped me a lot.It is just what I was looking for.

[McJohri]

eta² = (SS between / SS total) cannot be equal to partial eta² = (SS between / (SS total + SS error)), except to assume that SS error always equals 0 in one way ANOVA. Maybe it is as partial eta² = (SS between/ (SS between + SS error)).

[estherlisiane]

in case of many independent variables how to find their respective eta squared values? such that their respective size effect on the dependent variables is known?

[daniellewischenka]

Could you kindly provide a reference source for the eta squared interpretation guidelines (.26 = large, .13 = medium, .02 = small)?

[rohulamin]

Dr. Grande, very much enjoy your videos. I have learned a ton from them and has enabled me to get my work done. Question about this topic: My nominal variable is recorded in spread sheet as "Yes" or "No" instead of coded as "O" and "1". When I attempted to calculate ETA, it doesn't calculate it. Is it because it is coded as a "string" variable? Is there a way to make it numeric? thank you.

[amandachaffin]

I was a little confused on the difference in Eta and Eta-squared. I am also not sure what an affect size might affect.

[sanne]

Hey Dr. Grande, how does the calculating of Eta squared work if you deal with a Two way ANOVA?

[charlottedecrock]

Can someone help me with this question: How do you know if and at what level your eta correlation score is significant?

[sarahburrous]

I didn't quite follow this video but will come back to is as a reference when I figure out when to use Eta and Eta-squared.

[sdneroorkar]

Thank you for the video Dr. G. Is there a link which we can refer to for understanding which test of correlation to use for which kind of variables?

[kirosaregay]

Thank You Very much Dr. I get it very important an easy!!

[aprilbrooks]

Somewhat confusing, but I gather we are measuring association and Eta squared will tell us if there is a variation explained by DV because of variation in IV. The range is between 0 and 1 with 1 being perfect association. So much analysis!!!!