/teamtitleist/b/hole-in-one-stories/posts/observer-effect-or-can-i-get-a-witness My name is Jim Bray and this is the story of my (second) Hole-in-One. In physics, the term "observer effect" refers to changes that the act of observation will make on a phenomenon being observed. This is often the result of instruments that, by necessityen-USTelligent Community 10