it's stupid. A control for what? They're not conducting an experiment and basketball players don't play barefoot.
Aww, I dunno, Spear. Maybe for GMs who want to get every piece of info out on the table before they invest their one significant pick a year, upon which their career might rest, on a young guy who has never engaged in anything approaching this new level of competition, and would like to run an analysis based on historical trends using that data.
The perceived gap between a guy who is really what he claims and a guy who brings his minardi heels to the combine can easily be 2 inches or more - and if you take the league's reported numbers seriously, then you'll never be the wiser. Not a huge deal if you're dealing with a vet whose production in the league is well established, but when drafting high or mustering assets to acquire a young guy with "upside", it can make a significant difference.
That barefoot line is a real zinger, though - haven't heard that one before. It's not like it's thrown out in every single thread of this nature and has already been addressed by the shoe vs bone structure point.
No idea what science experiments have to do with it, but from here on out, I have this fantastic mental image of you, living in a world with no controls. You entertained the concept that one time in 5th grade when you and Billy K spent 15 minutes cleaning pennies with vinegar and taco sauce (7th place at the science fair!), but ultimately decided it wasn't for you.
Nowadays you give the finger to those pencil-necked geeks and their conventions.
When you test drive two different cars, you take one on the freeway, and the other up a gravel mountain path with a 45 degree incline. When you're trying to figure out which chick to ask out, you imagine one in full makeup and a bangin' dress, and the other getting up to tinkle at 3 am with serious bed-head and a cucumber mask.
This ain't no science experiment, you dorks. I'm Jason GD Spear. Back up.