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Callaway's D.A.R.T. alignment system uses the brain's perceptive abilities to get the ball rolling on the right path
DAVE PELZ has done research showing that when it comes to the direction of a putt, 80% of the influence comes from the face angle at impact and 20% comes from the path of the clubhead. Knowing that, Callaway designers set out to help golfers get the face square. To do so they relied on the Gestalt theory of perception, which argues that even when the eye sees random curves and lines, the brain works to organize them into recognizable shapes or patterns. According to Callaway, the D.A.R.T. (Direction and Realignment Technology) system uses this perceptive ability to help golfers hole more putts.
The red lines don't meet visually, but your brain unconsciously extends the lines to form a triangle.
The point of the triangle is not the point of impact but at a spot at the center of the ball in front of the white directional line.
If the face angle is off, even to a degree that can't be seen, the triangle can help you perceive the misalignment.