Larry talks about this in the on page 163 of the original TBL book....I
believe it refers to his 1989 paper

Michaelsen, L.K., Watson, W.E., Black, R.H. (1989) A realistic test of
individual versus group consensus decision making
<http://www.psych.uw.edu.pl/%7Ejasia/michaelsen.pdf> . Journal of Applied
Psychology, 74(5), 834-839

jim



From: Matt Barclay <[log in to unmask]>
Reply-To: Matt Barclay <[log in to unmask]>
Date: Thu, 02 Sep 2010 09:37:30 -0600
To: "[log in to unmask]" <[log in to unmask]>
Subject: evidence for higher gRAT scores

Hi Everyone,

When I was at the TBL conference back in March, I heard a number of people
claim that in all of their experience, groups score higher on the gRAT than
the highest score of any of the individual group members (on the
corresponding/preceding iRAT). I am very interested to know of any sources
that document these results. Are there any publications that deal with this
or is this something that people have casually noticed as they have gone
along? Any formal investigations?

Thank you.
Matt