[R] squared semi-partial correlation

[Liaw, Andy]

Please, this is a mailing list about R, not SPSS.  And what exact is
`semi-partial correlation'?

Andy

> From: N.Callow
> 
> Hi, can you help? I am really struggling to find the answer to the
> following question.
> 
> I have conducted a standard multiple regression using SPSS. 
> The dependent
> variable is CE, and the independent variables are Ibelieve 
> and Tbelieve.
> Because the independent variables are highly correlated I 
> have examined the
> squared semi-partial correlations. I
> understand that the Ibelieve squared semi partial correlation 
> accounts for
> a significant proportion of the variance in CE t= 2.689, whereas the
> tbelieve does not t = .556. However, I want to see if the squared
> semi-partial correlations are significantly different TO EACH OTHER
> (Ibelieve .168, Tbelieve .035 N= 220). How do I do this?  I 
> assume that I
> will need to do this "by hand" with an equation? Also, do I 
> have to take
> into account that the squared semi-partial correlations are 
> correlated in
> terms of the dependent variable? 
> Thanks very much.
> Nichola
> 
> 
> -- 
> http://www.shes.bangor.ac.uk/home.html
> ------------ 
> Dr Nichola Callow (C.Psychol.)
> School of Sport, Health, and Exercise Science
> University of Wales, Bangor
> George Building
> Holyhead Road
> Bangor
> Gwynedd LL57 2PX
> Tel: 44 (0) 1248 388243
> Fax: 44 (0) 1248 371053
> E-Mail: n.callow at bangor.ac.uk
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
> 
>