Jay Kidwell explains how this same technique is used by baseball hitters looking at a "red dot" in the center of the ball. This technique also prevents a stimulus confusion issue which causes a type of target anxiety. I use those 1.5" orange stickers used for gun targets. Periodically I put them on my bale target. After a couple days the image is again infused in my mind. 365 days a year I shoot at the "orange sticker" that I impose on stumps, targets, 3d, and animals. Also calms the nerves on living animals because I shoot at "orange stickers" all the time. Nothing new!