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*To*: tholtz@umd.edu*Subject*: Re: EQ (was RE: Tyrannosaur age-population distributions)*From*: K and T Dykes <ktdykes@arcor.de>*Date*: Mon, 17 Jul 2006 22:31:43 +0200*Cc*: dinosaur@usc.edu*References*: <NDBBIAJHGJBHMGNKDFAHIEIINDAA.tholtz@geol.umd.edu>*Reply-to*: ktdykes@arcor.de*Sender*: owner-DINOSAUR@usc.edu

<<EQ DOES normalize for body size. It isn't the ratio of brain to body size: it's a **residual from the curve** of brain vs. body mass. Specifically, it is: EQ = (E<sub>i)/(E<sub>e) were E<sub>i is the measured brain size, and E<sub>e is the expected brain size.>> Thanks for the correction, Tom. I knew E.Q. takes bodysize (and indeed other factors; eg. a fossorial lifestyle as opposed to an aboreal one, as inferred through bone wall thickness and build) into account, and expressed myself with some clumsiness. Nevertheless, comparing E.Q.s of tyrannosaurids with chickens strikes me as... I can't think of an appropriate term, so 'adventurous' will hopefully suffice. Cheers Trevor

**References**:**EQ (was RE: Tyrannosaur age-population distributions)***From:*"Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>

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