## Effect size f2 and predictive relevance Q2 for complex model

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hudapg
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### Effect size f2 and predictive relevance Q2 for complex model

I need urgent help plz.

I have a complex model where B,C,D are directed to A and E,F,G,H are directed to C. I want to calculate the f2 & Q2 for the DV A. I know how to do the F2 & Q2 for B to A & D to A, but when I want to do C to A shall I remove C and its IVs or only C and connect its IVs to A??

Hengkov
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Hello,

SmartPLS difficult computing f^2 and Q^2 for complex model. But in your case, if you already know f^2 B and D, you just compute R^2 A - (f^2 B + D) = f^2 C OK (It's just my trick). ;-)

Best Regards,
Hengky

hudapg
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Dear Hengky:
Thanks for your kind reply.. Indeed I have sent an email to a professor in one of the universities around and who is an expert in PLS. He kindly advised that I should in my case delete C with its IVs because I need to know its impact, which originally is affected by its IVs..

I managed to do it well based on his advice.

Hengkov
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Hi,
I know must remove C, but I give you a simply and quickly approach.

You know, sum f^2 BCD = R^2 A. Effect size is partial variance and R-square is total variance. Now, you know f^2 B & D and R^2 A,
for compute f^2 C very simple: R^2 A - (f^2 B + D) done!
I just explain for your understand My suggest, but if you choice and follow the professor advice, up to you. The result will be same OK.

Best Regards,
Hengky

davetol
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### Re: Effect size f2 and predictive relevance Q2 for complex m

Please, I am a doctoral candidate. i am presently analysing my data. i have 1IV, 2mediators and 1DV and the are all second order constructs(reflective-reflective). What are those things that i need to report in my study starting from missing data? Thanks.