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Yep, quite correct statement,<br>
<br>
but <i>the basic assumption while talking about group</i>'s both
action and performance is that the group <i>has the same</i> cost
(fitness, objective, loss, merit, etc) function. In other words,
that it works under same norm. (In science, the norm used is
typically to get better results, meaning the result closer to the
'truth', or closer to the true state of the nature as perceived by
the group. Important is that each individual works under same norm,
which is often the case in 'science').<br>
<br>
If, on the other side, subgroups of the group (and there may be 2,3,
..., up to |group| ) have different objective functions, group
will rarely be better than many individuals. Example given below is
a great one!<br>
<br>
On 23-Dec-11 5:02 PM, Irving Engelson wrote:
<blockquote cite="mid:4EF4FA80.7040608@ieee.org" type="cite">
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Carlos -- I know of cases where groups get worse ideas than many
of its individual e.g., the US Congress. <span
class="moz-smiley-s2"><span> :-( </span></span><br>
Irv<br>
<br>
On 12/16/2011 10:32 AM, Carlos Gershenson wrote:
<blockquote
cite="mid:9E232CA0-3105-4BCE-85F5-7732F5FFBA64@unam.mx"
type="cite">
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<pre wrap="">Do you know many cases where groups get better ideas than its individuals? For which kinds of problems does that happen?
</pre>
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<pre wrap="">See <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/Collective_intelligence">http://en.wikipedia.org/wiki/Collective_intelligence</a>
In this paper they offer some overview of collective intelligence (attached below):
Evidence for a Collective Intelligence Factor in the Performance of Human Groups
Anita Williams Woolley, Christopher F. Chabris, Alex Pentland, Nada Hashmi, and Thomas W. Malone
Science 29 October 2010: 330 (6004), 686-688.
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://dx.doi.org/10.1126/science.1193147">http://dx.doi.org/10.1126/science.1193147</a>
Their results show that groups of people work better not depending on the intelligence of individuals, but on how efficiently they interact. There is an interesting 6 min related TED talk at <a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.ted.com/talks/tom_wujec_build_a_tower.html">http://www.ted.com/talks/tom_wujec_build_a_tower.html</a>
I believe that Prof. Weng generalized the question: any cognitive system can be divided into components, usually the properties of the system are different than those of its components (e.g. neurons+molecules+energy), but we usually do not refer to properties of a brain as "group intelligence", even when it is indeed product of a collection of neurons, etc. It is just a convention.
Best wishes,
Caros
Dr. Carlos Gershenson
Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas
Universidad Nacional Autónoma de México
A.P. 20-726, 01000, México, D.F., México
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://turing.iimas.unam.mx/%7Ecgg/">http://turing.iimas.unam.mx/~cgg/</a>
Editor-in-Chief, Complexity Digest
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://comdig.unam.mx">http://comdig.unam.mx</a>
</pre>
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