PSPP - News: Factor Analysis and Rotations
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Factor Analysis and Rotations
Item posted by John Darrington <jmd> on Fri May 21 08:44:28 2010.
The latest PSPP master version now supports factor analysis/principal components analysis including factor rotations. Varimax, Quartimax and Equamax rotations are available. Currently oblique rotations are not supported.
The factor command also outputs a "scree" plot and loading matrices.
Comments:
| problems with PSPP factor (posted by Ton Vogels, Mon Aug 9 13:37:48 2010) |
I tried the new factor analysis and encounterd some problems
I suppose this is caused by a problematic handling of missing values, because when i removed observations with missing values all loadings remaind < 1.00.
However, when i compared the results with those of R-factal there were marked differences, both when using the correlation matrix and the covariance matrix.
I was not yet able to compare the results with those of SPSS, by I wonder how reliable the results of PSPP are. |
| RE: problems with PSPP factor (posted by Ton Vogels, Tue Aug 10 12:58:42 2010) |
I guess I was to sceptical about PSPP. I just checked the PSPP results with thos of SPSS and they are nearly identical.
|
| RE: problems with PSPP factor (posted by Juanma Belda, Thu Apr 28 16:29:15 2011) |
Its neither a problem of SPSS or R. In fact both are doing different things. In SPSS you are doing a factor analysis and the decomposition is slightly different that when you are doing a principal component analysis. |


