With a padded costume, the shoulders are accounted for. It's not really a proper question because the costume is what it is. The padded shoulders and false arms give an illusion of genuine bulk and exaggerated proportions.
So now you've got false arms? Prosthetics, like Meldrum said? With 1967 technology? Neither BH nor Morris said anything about false arms. BH's arms would have had to have been squashed between them.
The prosthetic hand for a recent sasquatch horror flick cost $10,000, BTW. That was just the hand.
That causes an IM analyst to give incorrect positions for the joints. They might be correct if it were actually an animal instead of a man in a costume. The suit causes at least two errors from illusion. First is that the shoulder joints are estimated to be higher than those of the man within. Secondly, those same joints are estimated to be wider than those of the man within. These factors combined with the extra long arms lead to an IM index that has very little to do with the guy inside.
The NASI IM index is flawed from the start because they measured it as if it were a Bigfoot, and then declared it a Bigfoot upon seeing their own results. That is totally screwed up.
Ahem. You already admitted you were wrong. NASI didn't do an IM index. Again, it's a ratio. Height, weight, breadth don't matter.
The shoulder breadth is a third wider than an average man's- and that's a ratio too.
If NASI were to do an IM index estimation of a realistic gorilla costume (such as from
Gorillas in the Mist), they would come up with a gorilla IM index. But it's a guy in a costume! Don't you get it?
No. And I don't think you do either.
"Morris inadvertently made one valuable contribution to real sasquatch research, by claiming that he told Patterson how to make the arms of his suit longer, by extending the hands, which were just gloves, on wooden sticks. Such an extension would be entirely below the elbow, and indeed any extension would have to be, since the elbows bend and straighten in the film, but a forearm extension long enough to match the relationship between total arm length and total leg length observable in the film would have to be so great that the arms would look ridiculously out of proportion. The arms of the film creature, while much longer, are proportioned about the same as those of a normal human.
A posting about this observation on the internet brought a response that the percentage which the long bones of the arm are of the long bones of the leg is called by physical anthropologists “the intermembral index” and the IM index is used as a standard way to distinguish one primate from another, presumably in studying skeletons. Humans have IM indices ranging around 70.
All the great apes are over 100.The bones of the film creature aren't available for measurement, but observation of its movements provides a reasonable indication of where the joints are, and almost all estimates of its IM index have so far ranged in the 80's. Reuben Steindorf, a forensic animator who studied the film using a sophisticated computer program, says he expected to prove it showed a man in a suit, but instead found it had a way of walking totally unlike that of a human, and an IM index close to 90. (Korff, of course, says that Heironimus walks just like the creature in the film, but he said the same about Jerry Romney.) "
<emphasis mine>
http://www.bigfootencounters.com/articles/response_si.htm
The fact that NASI never did an estimate for a known costumed man just shows how truly sucky their report is. There is a damn good reason why real science has no time for reports that look like they were created by charlatans or carnival sideshow managers.
Have you even read it?
...you just sit tight.