Shoanes study may have found that one-handed putting produced the least amount of head and eye movements, but that doesnt mean everyone should start putting one-handed.
"Our study can serve as a guide," says Shoane, professor of biomedical engineering at Rutgers University. "But individuals should experiment with all the grips at different distances and see whats most comfortable for them, and what works for them."
In other words, one-handed putting might reduce eye and head movements, but putting that way feels unnatural to a lot of people. And as any golfer will tell you, science might help your putting, but at a certain point natural ability and an instinctive "feel" for the game is what really matters. Shoane himself (an avid golfer) has switched back and forth among the different grips over the years. In general, however, he recommends trying one-handed or cross-handed grip for shorter putts.
That approach was put to the test by pro golfer Bob Estes (unaware of Shoanes study), who was having trouble with his putting. He said that it made a huge difference for him, and Estes recently won the Kemper Open tournament.