A system and method for determining an amount and direction of a golfer's head movement as the golfer executes a golf swing. The system may include at least two light baffles for monitoring the golfer's head movement along a path generally parallel to a target line. The baffles may reflect light into the golfer's eyes when the golfer's head is either outside and to the left of a preset range, or outside and to the right of the preset range. The system may further include at least two additional light baffles for monitoring lunging and bobbing head motion. The additional light baffles may reflect light into the golfer's eyes when the golfer's head lunges or bobs beyond a further preset range.