Dear Mike,
Allow me to make three quick additional comments about the
Vickers article in Golf Digest (Dec. 2003):
1. The article deliberately obscures what is meant by "good" versus "poor" golfers in describing how "elite" golfers use their eyes in putting. Apparently, Vickers and the editors of Golf Digest wanted to convey the impression that elite Tour players use their eyes the way Vickers describes in the article. That is because the lifeblood of a golf instructional magazine is the notion that whatever the "expert" players do is best, so that explaining what experts do to amateur golfers is what draws the amateur readership to the magazine's articles and hence to their ads. In this case, however, Dr Vickers has never studied Tour players. As is true of almost all "academic" science studies in golf, Dr Vickers gathered together two groups of college students, one with high handicaps and one with low handicaps. These students were observed putting straight putts in a lab setting. It would not serve the interest of the magazine or the author to explain this in the Golf Digest article.
2. The Crews images of brains of "good" versus "poor" putters is not as easily interpreted as the authors suggest. What it means to me is that "poor" putters are poor because they have way too much thinking going on. The point of the article is about the back of the brain where the visual processes are. The comparative photos show lots of activity in the front of poor golfers (top of image in top left of four) and not much at all in the back (bottom of same image), whereas good golfers have very little in the front and some in the back (top right image of four). And these images are a blend of a number of golfers at different points in the stroke. My point is that the brain activity images tell us more about poor golfers than they do about visual processes in good golfers.
In my experience, the important processing occurs in the parietal lobe on the side, not the occipital lobe at the back of the head. (The authors seem to agree with this, but don't recognize the significance to their work.) The body in space relating to a target is all about combining visual information with body position information, so the important step comes AFTER visual processes are completed. In my approach, the gaze is how the direction of the eyes is controlled in relation to head and neck movement so that the head and neck movement is accurate in delivering the line of sight to locations of interest (e.g., target, line, ball). This properly integrates vision with the body in space, as vision is merely the handmaiden of spatial awareness of the relation between the body and the target.
To me, then, the images of "good" putters shows MORE visual processing than that of "poor" putters, according to the color scale along the side. More importantly, the images are looking at a barn with the door open while the horse to watch is off grazing in the parietal lobe combining visual information with body and movement information.
3. Vickers says that elite golfers use quick "saccades" from ball to hole and from hole to ball, and have "quiet" gaze steady on the target and then on the ball. A "saccade" is a quick darting of the eyeballs from one direction to another, moved by short quick contractions of the eye muscles to yank the eyeballs as a team to a new direction. All "saccades" are ballistic in nature, very quick from start to finish, and are not all that accurate in terms of ending up where you want them to go based on a memory of where the target is located that you want to "saccade" to. This use of the eye muscles is in direct conflict with the notion of a steady "quiet eye" gaze, and also with the author's suggestion that the gaze move steadily and smoothly from target to ball.
The advice at the end of the article on how to develop a "quiet eye" pattern states: "SCAN FROM HOLE TO BALL: Smoothly shift your gaze without interruption from the target to the back of the ball. Your gaze should move calmly and efficiently."
However, earlier in the middle of the article, Vickers writes: "Good putters use rapid shifts of gaze (head and eye movements combined) in which no conscious information is processed to link the specific spot on the hole with the specific location on the back of the ball. They fixate on the spot on the hole for one to two seconds and then use rapid shifts of the gaze between the spot and the back of the ball for 300 to 500 milliseconds. (There are 1,000 milliseconds in a second; you become aware of something when your gaze is stable on one location for at least 100ms. It takes about 180ms to see something and make or correct a movement.)"
Elsewhere she states that good putters have efficient visual processes, whereas poor putter have many and erratic quick gazes or saccades.
This is pretty confused by the author. A calm and steady scanning from target to ball is most emphatically NOT a saccade at all but what is called a "smooth pursuit" eye movement with the "vestibulo-ocular reflex" actively suppressed by resisting focus at specific locations along the scan path in favor of allowing the head turn to smoothly deliver the line of sight along a straight line. Eye muscle movements in the saccade, whether rapid and efficient or numerous and erratic, do not help the golfer get a good bead on the target and the relation of the body to the target. The important work is to build a sense of aiming the putterface and the stroke straight at the target, and this is fundamentally spatial awareness, not mere visual processes.
Some Tour players today use quick saccades in putting, but they should not, and better Tour putters use a calm steady smooth pursuit type of look from ball to target and back. You only have to look for eye motion by Tour players in putting to see this, and apparently Vickers wants all golfers to putt like college students. She also wants us to believe without study or evidence that her "quiet eye" accurately describes the best putters in the game, including the rapid saccades.
So, altogether it is something of a pity that Golf Digest endorses a misguided use of science that thoroughly muddies the waters and makes real progress much harder.
Cheers!
Geoff