I believe part of the problem may have to do with which way your scales run
along the original constructs, i.e. if you have say, a 7-point scale, it can
run 1 (highest on construct) to 7 (highest on contrast), OR, vice versa. But
I'm open to correction on this.
best wishes
Geoff
>Advice is sought regarding what parameters can affect the signs in a
>PCA/factor analysis. I am trying to work out why the factor loading signs
>vary when two versions of the same program are applied to the same data.
>The loadings are not exactly mirrored.
>
>Regards,
>
>Bob Green
>
>
Geoffrey Blowers
Associate Professor
Dept of Psychology
University of Hong Kong
Tel: (852)-2859-2378(O) (852-2517-1885(H)
Fax: (852)-2858-3518
e-mail: blowers@hkucc.hku.hk
website: http://www.hku.hk/psychodp/blowers.html
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