I have been working with SOC 13 and we looked at Antonovsky's book (Unraveling the Mystery of Health) and many other publications, but we did not find anything.
I am intrigued how SOC29 was shortened. Thanks.
Hi Roger, Although this article does not describe exactly how Antonovsky shortened the SOC29, it does provide fairly detailed information on the differences between the two...
Talk to Monika Eriksson http://www.salutogenesis.hv.se/swe/Kontakt.63.html
She has recently written a book about Sense of Coherense and measurement http://link.springer.com/chapter/10.1007/978-3-319-04600-6_12
and is really the specialist in this area.
As most of the scale reductions, SOC-13 (that of course is shorter) has been wildely adopted for empirical studies over the old version of 29 items. The reason? Without having accurate information, because literature is so difuse regarding this issue, I think it was only pragmatism, such as happened with other scales such as GHQ, DBQ, SCL, etc.
In other words, if you have a good measure with less items, and want to asses other variables, your questionnaire will be better to ve solved.
The way they did it? I think it has to be through factorial reduction based on a wide application of the former scale, and selecting the best items (according to factorial weights) to evaluate both specific sub-dimensions as, even, for the SOC variable seen as a undivisible construct.
Moreover, I consider SOC-13 as a really useful tool for quick assessment of the construct. You can observe Cronbach' Alpha scores ranging from 0.82-0.90, and a really good factor adjustment in this short version.
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