Er, they only measured 52 guys--that's hardly a significant statistical sampling.
And, instead of measuring the erect penis, whose size is pretty much "set" once it gets there, they were measuring the flaccid penis--by stretching. That's hardly scientific.
In lieu of measuring a man's erect penis, the team measured the flaccid, gently stretched penis, which they note is statistically correlated to erect penis length.
If they really were going to be scientific about this, they should have specified a "pull strength" by using a pull gauge.
Here's one. Only $65.
Electronic Digital Trigger Pull Gauge
For those who want the most from their trigger.
The new Lyman Trigger Pull Gauge is designed to be the fastest and most accurate Trigger Pull Gauge available on the market. Unlike other gauges, there are no weights or sliding pointers to contend with. Simply place the gauge on the trigger and pull! This instrument will accurately record the results, as you can take multiple readings and then take the average weight for the string at the touch of a button! This state of the art instrument is a must for any shooter or gunsmith!
* 0-12 Pound Range
* 1/10 Ounce Accuracy
* 10 Pull Averaging
* Reads in Kilograms
* Large Digital LCD Display
* Strain Gauge Technology
Decide ahead of time how hard you're going to pull on the penises, rig up a Velcro strap to attach it, and go.