See the below as well. They are for cohesive subgroups, but the first piece
has some for structural similarity as well
Frank, K. A.
and Yasumoto, J. 1996. "Embedding Subgroups in the Sociogram: Linking
Theory and Image". Connections 19 (1): 43-57 .
See https://www.msu.edu/~kenfrank/research.htm#representation
-----Original Message-----
From: Social Networks Discussion Forum [mailto:[log in to unmask]] On Behalf
Of Carl Nordlund
Sent: Wednesday, March 31, 2010 12:26 PM
To: [log in to unmask]
Subject: Re: MDS visualization of CONCOR output
***** To join INSNA, visit http://www.insna.org *****
References:
Sim, F. M. and Schwartz, M. R. 1979. /Does Concor Find Positions?/
Paper
presented at the Annual Meeting of the Eastern Sociological Society,
New
Doreian, P. 1988. Using Multiple Network Analytic Tools for a Single
Social Network. /Social Networks/, 10, pp. 287-312.
Faust, K. 1988. Comparison of Methods for Positional Analysis:
Structural and General Equivalences. /Social Networks/, 10(4), pp.
313-341.
Schwartz, J. E. 1977. An Examination of CONCOR and Related Methods for
Blocking Sociometric Data. /Sociological Methodology/, 8, pp. 255-282.
Semenov Alexander wrote:
> Thanks!
> I have one more question - can you give me full citations of the
> mentioned articles? I know only Doreian's article and can't
identify
> others.
> Alexander.
>
> 2010/3/31 Carl Nordlund <[log in to unmask]
> <mailto:[log in to unmask]>>
>
> Hi,
> Even though the Concor algorithm can provide results that are
> intuitive, there has been quite a lot of critique raised
against
> it (e.g. Sim and Schwartz 1979; Doreian 1988; Faust 1988). One
of
> its founders has explicitly said that there is "[no]
justification
> for advocating the iteration of [correlance coefficients]
matrices
> as a method for analysis of data" (Schwartz 1977:266ff).
Tha
> algorithm always produced 2 splits, and makes subsequent
> partitions quite arbitrary when it comes to which of these
splits
> to split further.
>
> If there are strong arguments to use structural equivalence,
> perhaps it would be better to simply use the correlance matrix
> (distance-based or Pearson) and use MDS to plot these in two
> dimensions, subsequently interpreting this in combination with
a
> dendrogram. Depending on the data, and what you are looking
for,
> you should also look into regular equivalence (if that
specific
> sociological notion of "roles" is applicable to your
particular
> study).
>
> I might be wrong, but it was quite some time since I last saw
a
> solid argument on the advantages of using the Concor
algorithm.
>
> Yours,
> Carl
>
> Semenov Alexander wrote:
>
> ***** To join INSNA, visit http://www.insna.org *****
>
> I guess you have your data already clustered by CONCOR,
and you
> would like
> to present the reduced blockmatrix by MDS?
>
> When I run MDS directly in NetMiner it draws me a map with
> only a few visible actors. It seems like 90% of nodes are
> exactly in the centre and one-two are at the end of each
axis.
> It's almost imposible to interpret such picture. But when
I
> check MDS as an output option in CONCOR, it shows me nice
> scatter plot with 3 distinctive axis and some dispersion.
This
> picture corresponds with my substantive assumptions and
very
> interesting for interpretation.
>
> Anyhow, you will be much more exposed to criticism for
adopting
> CONCOR, than
> for using MDS...
>
> Why? Unfortunatelly, I really doubt it =( Here in
> is only one thesis on SNA and only one book about it. And
the
> author of both of them is my tutor. My search for SNA in
local
> sociological journals revealed only 4 articles. So, this
> listserve is the only place for me to search an advice.
That's
> why I'm asking such a noob questions.
> Alexander.
>
>
> 2010/3/31 Balazs Vedres <[log in to unmask]
> <mailto:[log in to unmask]> <mailto:[log in to unmask]
> <mailto:[log in to unmask]>>>
>
>
> ***** To join INSNA, visit http://www.insna.org *****
>
> "rarely used" - I think it is very often
used.
> I guess you have your data already clustered by CONCOR,
and you
> would like
> to present the reduced blockmatrix by MDS? That is
fine.
> You can also use MDS to represent the original
structural
> similarity measure
> matrix, and possibly include the centroids of CONCOR blocks.
> Anyhow, you will be much more exposed to criticism for
adopting
> CONCOR, than
> for using MDS...
>
> -----Original Message-----
> From: Social Networks Discussion Forum [mailto:
>
>
>
> --
> Carl Nordlund, BA, PhD student
> carl.nordlund(at)hek.lu.se <http://hek.lu.se>
> Human Ecology Division,
> www.hek.lu.se <http://www.hek.lu.se>
>
>
>
>
> --
> Alexander Semenov.
> MA student
> Faculty of Sociology
>
> http://www.msses.ru/English/index.html
>
> Graduate Student in Sociology at
>
> http://www.hse.ru/eng
--
Carl Nordlund, BA, PhD student
carl.nordlund(at)hek.lu.se
Human Ecology Division,
www.hek.lu.se
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